Showing posts with label atmosphere. Show all posts
Showing posts with label atmosphere. Show all posts

Wednesday, June 25, 2025

The new Mach 5 hypersonic aircraft stuns the world.


The new space programs require trusted low-cost, easily operated launching systems like space planes. The term space plane means a space shuttle that can operate from regular runways. Hypersonic technology can open the road to that kind of space systems. This type of shuttle can operate in the atmosphere and orbitals. These are key elements for building large-scale space projects. They can also revolutionize warfare and transportation. Without those space planes, things like nuclear rockets will be unable, or very hard to produce. The miniature nuclear reactor allows a nuclear-powered space plane to operate in interplanetary space. And that opens the road to the entire solar system. 


There is a possibility to replace the combustion in the ramjet and scramjet engines using electric arcs or some other system that heats the air.  The main problem with those electromagnetic ramjet engines is that they need electricity from somewhere that they can heat and expand the air that they pull in the engine. The system can use electric arcs, microwaves, or lasers to pull gas in the engine. 

And one of the systems that can create the wanted electricity is the small nuclear reactor. That kind of system tested in the Ling-Temco-Vought was the company whose mission was to create the Supersonic Low altitude missile SLAM. The main thing was that the SLAM or “Project Pluto” used nuclear reactors for heating air. The main system used was the nuclear-powered ramjet system that breathed air from the atmosphere. And then the nuclear reactor warmed that air. That air cooled the reactor’s shell and denied its overheating. 

Virtually that system can have unlimited range and operational time. The problem was the radioactive fallout. The SLAM could be more capable if it could have an isolated reactor system that could give electricity to the electric ramjet systems. In those systems electromagnetic systems create heat that expands the air. Suppose SLAM would have an internal propellant tank that could also operate in the orbital trajectory. When air turns too thin the system starts to use internal propellant. Maybe that kind of nuclear-powered shuttle will be a reality someday. 


Above: SLAM (Project Pluto)

The air-breathing rockets are the new things. In the atmosphere, the system can use the compressor that is at the side of the engine. When the system uses atmospheric rocket mode that system can inject from the side of the engine. When the system goes out from the atmosphere it transfers to use internal oxygen. That kind of system can also be connected to ramjet engines. At slow speed, the system uses the iris that closes the air intake. That aircraft runs into the air using rockets. When the system’s speed is about Mach 1 the iris will open and then the ramjet ignites. When the system is at the edge of space, it closes the air intake and transfers to use internal oxygen. 


A cutaway diagram of an X-51A’s subsystems packaging. (SIPRI, A matter of speed? Understanding hypersonic missile systems)

Normally those hypersonic systems use the ramjet or scramjet as engine solutions. The hypersonic missiles path the way to new hypersonic systems and space planes. If those systems can breathe oxygen from the atmosphere that decreases the need for internal oxygen. And it increases the payload. 

Hypersonic technology stuns the world. Hypersonic missiles and cruise missiles are turning new types of systems into reality. If the aircraft can fly at hypersonic speed by using air-breathing engines in the atmosphere and it has a capacity switch into rocket engines that system can fly in both orbital and atmosphere. The hypersonic aircraft can also have stealth capacity because stealth planes' soft curves are aerodynamically good things. Some of those hypersonic systems can have small tracks on their layers. Those tracks' mission is to drive air in the desired direction. The thing is that the new types of plasma systems can also decrease friction. 

Basically, lasers are tools that can be used to ionize gas at the front of the wings and engines. Another way is to use some other types of electromagnetic radiation like a maser technology. That radiation shoots electrons away from the atom's orbital and turns those atoms into ions. 

The idea is that there is a system that ionizes air around the aircraft. Then the electric system can simply push those ions away from the aircraft’s body. That decreases friction. And the same systems can also turn the aircraft invisible to radars. The ion system can also pull air into the engine where electromagnetic systems can heat it. Ion technology allows the use of more radical and effective systems than traditional ramjets and scramjets. 

The accelerator systems can be based on the Gauss track. The electromagnetic acceleration system accelerates ions over and below the wing. That thing causes the airflow that increases buoyancy. There is also a possibility that the magnet pushes air away from the front of the aircraft, And that creates low pressure that pulls it forward. This thing can be the new step for quiet hypersonic systems. 


https://www.hermeus.com/

https://www.sipri.org/commentary/topical-backgrounder/2022/matter-speed-understanding-hypersonic-missile-systems


https://www.sustainability-times.com/energy/china-in-shock-new-hypersonic-aircraft-with-mach-5-speeds-triggers-massive-global-reaction-after-us-engine-breakthrough/


https://en.wikipedia.org/wiki/Project_Pluto




Saturday, April 5, 2025

Toxic dust covers the Planet Mars.


"Martian dust isn’t just a nuisance, it could cause serious health problems. Researchers found it’s filled with toxic compounds that could scar lungs and disrupt thyroid function, posing a real danger to future astronauts. Credit: SciTechDaily.com

"Mars might be a thrilling destination, but its dust could be deadly."

"A team of scientists warns that long-term exposure to Martian dust could harm future astronauts’ lungs, thyroids, and more. Packed with toxic compounds like silicates and perchlorates, the dust is small enough to bypass our body’s defenses and enter the bloodstream. Drawing on rover data and meteorite analysis, researchers say now is the time to develop filters, supplements, and preventive measures before humans ever set foot on the Red Planet." 

(ScitechDaily, Mars Is Covered in Toxic Dust – And It’s a Serious Threat to Human Exploration)

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Mars is not like Earth at all. That planet has a different chemical environment than Earth. Mars is covered by toxic dust. That can make space trips to that planet more complicated than nobody thought. 

Mars's surface is covered by red sand. 

That sand can form a dust storm called "Sand devils". 

It's possible that dust storms can form static electricity. That electricity can cause problems with electronics. Static electricity is not the only thing that can cause problems on the red planet. There are also chemical dangers. And the space crew must clean all that dust from their suits. The dust itself can slip under the computer consoles. And that can cause a malfunction in the keyboards. 


"This graphic shows the long-chain organic molecules decane, undecane, and dodecane. These are the largest organic molecules discovered on Mars to date. They were detected in a drilled rock sample called “Cumberland” that was analyzed by the Sample Analysis at Mars lab inside the belly of NASA’s Curiosity rover. The rover, whose selfie is on the right side of the image, has been exploring Gale Crater since 2012. An image of the Cumberland drill hole is faintly visible in the background of the molecule chains. Credit: NASA/Dan Gallagher" (ScitechDaily, Life on Mars? NASA’s Curiosity Rover Finds Prebiotic Clues in a 3.7-Billion-Year-Old Rock)

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"They include minerals rich in silicates and iron oxides, metals like beryllium and arsenic, and a particularly nasty class of compounds called perchlorates."

"In many cases, those ingredients are present in only trace amounts in Mars dust. But the first human explorers on Mars may spend around a year and a half on the surface, increasing their exposure, said study co-author Brian Hynek."

“You’re going to get dust on your spacesuits, and you’re going to have to deal with regular dust storms,” said Hynek, a geologist at the Laboratory for Atmospheric and Space Physics (LASP) at CU Boulder. “We really need to characterize this dust so that we know what the hazards are.” 

(ScitechDaily, Mars Is Covered in Toxic Dust – And It’s a Serious Threat to Human Exploration)

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There are also long carbon molecules on the Red Planet's surface. Those carbon molecules are dangerous if they can go into living cells. Long carbon-chain molecules can open in the cell. And then they can cause damage to the cell's internal structures. That kind of damage can kill the entire cell. The thing is that. Mars is a very dry and cold place. 

There is no liquid water. And that makes chemical reactions different from what they are on Earth. Mars is a very stable place. On that can form molecules that do not exist on Earth. Those molecules can form in a very long time.  


https://scitechdaily.com/life-on-mars-nasas-curiosity-rover-finds-prebiotic-clues-in-a-3-7-billion-year-old-rock/


https://scitechdaily.com/mars-is-covered-in-toxic-dust-and-its-a-serious-threat-to-human-exploration/


Thursday, February 6, 2025

The mystery of Titan's dense atmosphere.


"SwRI is studying how Saturn’s largest moon maintains its thick atmosphere. Scientists think Titan’s core is covered by several layers of ice and a subsurface liquid ocean. New experiments indicate that nitrogen and methane gases produced by the organic materials at its core could seep up to the surface, continuously replenishing Titan’s atmosphere. Credit: Southwest Research Institute" (ScitechDaily, Scientists Unlock the Secrets of Titan’s Dense Atmosphere)


Titan is quite a small object in our solar system.  It's the largest moon of Saturn. That is the second-largest moon, and only Jupiter's Ganymede is bigger. The dense atmosphere of that moon is one of the biggest mysteries in our solar system. The main gas is nitrogen in its atmosphere is nitrogen, but there is also a small dose of methane. The atmosphere pressure on Titan's surface is 146.7 kPa (1.45 atm). And that makes this thing interesting. The mass of Titan is only  0.0225 Earth, and its escaping velocity is only 2.641 km/s. Escaping velocity from Earth is 11.186 km/s. 

Can Titan be like a magnetic monopole? If the other pole of that moon's magnetic field is weak its magnetic field can unite over the weaker pole. And that forms a magnetic monopolar field around it. 

Can this effect form because Titan's magnetic field is so special? Can the other pole of Titan's moon's magnetic field be very weak? That can make Titan act like a magnetic monopole.  If that is true the Titan moon can pull ions against its surface. In that model, Titan can have a normal nucleus like all other planets. But if there is a large subsurface ocean.


"Artistic rendering of hydrothermal vents on the seafloor of the Saturnian moon Enceladus. Credit: NASA/JPL-Caltech, edited" (ScitechDaily, Could Saturn’s Moon Enceladus Be Hiding Clues to Alien Life?)

It's possible that some magnetic minerals or compounds that can look like a stick can turn their standing position against Titan's nucleus. And if as an example N pole in those sticks is outside that turns Titan into the monopolar structure. 

There can be some kind of tunneling force or electromagnetic phenomenon that pulls those gases against the Titan surface. The dust storms can form static electricity that can pull ionized gas to the surface. The idea is if there is some kind of EM field and some molecules and atoms are ionized that pulls them to the surface. In the widest theories, Titan is a magnetic monopole that can pull ions and anions over it. Or its nucleus can behave like a magnetic monopole if another pole on that strange moon is very weak. 

And the question is how the Titan can maintain its dense atmosphere. Another mystery is the methane gas that the Titan atmosphere involves 1,4%. The question is the source of that gas. The Titan structure might involve a subsurface ocean. And even if Titan's surface is totally without water. It's possible. The subsurface ocean can involve water. That can make Titan one of the promising harbors of life. 

An interesting detail is the thing that makes Titan more interesting is that there is suspicion that also another Saturn moon Enceladus can harbor some primitive lifeforms. Similar suspicions are introduced for other large moons, where there are subsurface oceans. Water is a good protector against the cosmic rays and that's why those icy moons are interesting. 



https://scitechdaily.com/could-saturns-moon-enceladus-be-hiding-clues-to-alien-life/


https://scitechdaily.com/scientists-unlock-the-secrets-of-titans-dense-atmosphere/


https://en.wikipedia.org/wiki/Earth


https://en.wikipedia.org/wiki/Enceladus


https://en.wikipedia.org/wiki/Standard_atmosphere_(unit)


https://en.wikipedia.org/wiki/Titan_(moon)

Monday, November 11, 2024

Gravity waves and whirls.

Above: Spiral Galaxy Messier-77

Do you know what connects gravitational waves and atmospheric gravity waves? And what connects galaxies and tropical storms? The galaxy or spiral galaxy is the whirl as well as a tropical storm. There is a structure that can cause the waves in the field. Or, there is a structure that touches the field and sends wave movement through it. The gravity wave that the tropical storm sends is molecular movement. 

A gravitational wave travels in the Higgs field. The spiral galaxy is the whirl that mass center, the supermassive black hole forms around it. So, when researchers observe galaxies and quasars they get information on how the black hole forms whirls in extremely large conditions. And then they can try to adapt that model to the tropical storms. 

The galaxy starts its life as a quasar. When a large interstellar nebula falls because of its gravity that thing forms a supermassive or medium-size black hole. The supermassive black hole forms the high-energy object by pulling material around it. That thing is the quasar. Then there is forming an elliptical galaxy, and finally a spiral galaxy. The large-size elliptic galaxies can form when two spiral galaxies collide. 


"Artist’s impression of the LISA space mission. LISA’s findings may show dominant gravitational waves from white dwarfs, revealing more about star evolution outside our galaxy. Credit: ESA" (ScitechDaily, White Dwarfs Might Overpower Black Holes in LISA Mission, Researchers Warn)


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Difference between atmospheric gravity waves and real gravitational waves. 


Sometimes people make the difference between gravity and gravitational waves. Gravitational waves are the wave movement that gravitational objects send through the universe. Gravity waves are wave movement between molecules in the atmosphere. But normally we can use gravity waves for both things. Below are some descriptions of those things. 

Atmospheric Gravity Waves occur in Earth’s atmosphere and are generated when air is disturbed by events like storms, hurricanes, or terrain features (such as mountains). These waves propagate through the atmosphere, creating ripple effects as gravity works to restore balance, causing air to oscillate in wave-like patterns. They are part of meteorological and atmospheric studies because they influence weather patterns, air flow, and even space weather interactions within Earth’s upper atmosphere.

Gravitational Waves, on the other hand, are ripples in space-time itself, predicted by Einstein’s theory of general relativity and first directly detected in 2015. They are produced by massive cosmic events, such as black holes merging or neutron stars colliding, and propagate across the universe at the speed of light. Unlike atmospheric gravity waves, gravitational waves are not related to Earth’s atmosphere but are fundamental distortions in the fabric of space-time and are studied within the field of astrophysics.

(Scitechdaily, NASA Unveils Astonishing Gravity Waves Caused by Hurricane Helene)

https://en.wikipedia.org/wiki/Gravitational_wave

https://en.wikipedia.org/wiki/Gravity_wave

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Above: The Chandra X-ray image is of the quasar PKS 1127-145, a highly luminous source of X-rays and visible light about 10 billion light-years from Earth. An enormous X-ray jet extends at least a million light-years from the quasar. (Wikipedia, Quasar)


When we look at images of the quasars we can see the material jet that comes from its black hole. That jet is the axle. That starts to rotate the gas nebula around it. That means there forms a hole or tunnel through the galaxy, and that tunnel acts as an axle that rotates the gas disk forming an elliptical galaxy. 

In the same way, hurricanes or cyclones form around the tunnel that forms through the atmosphere. Sometimes there is a cloud that pulls air from above and below it. If those whirls rotate in the same direction they form the air statue that starts to create a whirl-looking cloud structure around it. The pressure difference between the top of the whirl and the bottom of the whirl makes the airflow that denies the side coming air from filling that whirl. It's a theoretical possibility that tornadoes form in the eye of the hurricane. That would increase its power to limits that we cannot even imagine. 


Above: Tropical storm, 

In galaxies, the tunnel or the whirl is the relativistic jet of a supermassive black hole. That high energy gas and material makes a similar, but larger scale effect as whirl makes around the tropic storms, called hurricanes. 

But then we can look at the gravity waves that form in the gravity field or base energy field in the universe. Normally we see that the black holes and neutron stars that orbit each other send those waves. The thing is that also alone neutron stars and black holes send those gravitational waves. That makes physicists suspicious that there is some kind of similar structure in all particles. 

The source of the gravity waves can be in the bonds or tunnels between or inside quarks. When those structures spin very fast they push the Higgs field. And that sends wave movement around them. Some part of energy will stored in the particles. When we think about gravity waves those things are like electromagnetic waves. Massive and supermassive objects can boost their strength. So, when a gravity wave travels through the universe and faces the other gravity center. Those gravity centers increase their power. 

That means. The gravity centers like white dwarfs can focus those gravity waves into one point. And that gravitational maser emission increases the power of gravity waves. 


https://scitechdaily.com/nasa-unveils-astonishing-gravity-waves-caused-by-hurricane-helene/


https://scitechdaily.com/white-dwarfs-might-overpower-black-holes-in-lisa-mission-researchers-warn/


https://en.wikipedia.org/wiki/Gravitational_wave


https://en.wikipedia.org/wiki/Gravity_wave


https://en.wikipedia.org/wiki/Quasar


https://en.wikipedia.org/wiki/Spiral_galaxy


https://en.wikipedia.org/wiki/Tropical_cyclone

Wednesday, November 6, 2024

How dangerous asteroid is?


"Recent research led by the University of Maryland using the Zwicky Transient Facility telescope has revealed that the Taurid swarm, a stream of space debris from the comet Encke, poses less of a threat than previously believed. Credit: SciTechDaily.com. " (ScitechDaily, How Dangerous Is the “Doomsday” Asteroid Swarm?)

Asteroid impacts are always dangerous. If the 10X10 m cosmic rock impacts the ground with the cosmic speed that can cause local damage. The local damage means that the city center can turn into a crater. And if a small asteroid hits the water, it can form a tsunami. The problem is that the small-size asteroids are detected at the last moment. The bigger, mountain-sie asteroids are easier to detect. 

But turning those asteroids away from their course is hard because of their large size. When a large-size asteroid hits the ground or water it is dust and vapor to the atmosphere. The asteroid also turns the atmosphere very hot in its trajectory. 

And if the angle of the incoming asteroid is low the friction raises the atmosphere's temperature in a long route. And that can cause even global forest fires. The steep trajectory makes it possible for the atmosphere to turn hotter in more limited areas. But the asteroid can fall to the bottom of the ocean. And make the hole to magma. That can cause a nuclear winter that can collapse our entire ecosystem. 

The impact of asteroids destroyed dinosaurs That thing means that the asteroid impacts are dangerous things. If some asteroid comes to impact course to Earth. And falls to some major city that destroys the city. 

However large groups of small meteorites or meteoroids could be dangerous. if a large number of quite small meteoroids that burn in the atmosphere impact Earth's atmosphere that thing can form a case, that those small particles can raise the atmosphere temperature. Theoretically, that kind of meteoroid fall can raise the Earth's atmosphere temperature so high, that things like forests start to burn. The meteoroids can be as devastating as larger asteroids. But the requirement is that there are lots of meteoroids. 


https://scitechdaily.com/how-dangerous-is-the-doomsday-asteroid-swarm/

Friday, October 25, 2024

There is a mysterious carbon dioxide and peroxide in Pluto's Charon moon.


"Carbon dioxide and hydrogen peroxide have been detected on Charon through the James Webb Space Telescope. This breakthrough adds significant details to our understanding of the moon’s surface and its environmental processes. Credit: S. Protopapa/SwRI/NASA/ESA/CSA/STScI/JHUAPL" (ScitechDaily, Webb Telescope Uncovers Carbon Dioxide and Peroxide on Pluto’s Moon Charon)
 

Pluto and its moon Charon are very far away from Earth. There is almost no sunlight. And the temperature on their surface is almost zero kelvin. The chemical reactions are thought to be impossible in that distant, strange world. But the signs of CO2 and peroxides show that there are some kind of chemical reactions in those distant worlds. When we think about those distant dwarf planets called "plutoids" we must realize that conditions around and on those dwarf planets are different than on Earth.

In distant worlds near the Kuiper belt, those dwarf planets can collect atmospheres around them. Most of the solar wind particles are ions and anions that the dwarf planet can trap around it. Those particles can form an ion whirl around those small objects. That ion whirl acts similar way as the ion whirl acts around black holes. It forms the ion generator that forms the magnetic field around plutoids. And even if that magnetic field is weaker than around Earth the reaction that forms a magnetic field around Quaoar forms a magnetic field around black holes.

The conditions around Pluto, Charon, and Quaoar are not similar. The reason why Quaoar has a ring system, but Pluto does not is the Charon's and Pluto'smutual gravity effect that denies ring formation. Quaoar is a lone dwarf planet and that means its clear gravity center in its environment. 


"Artist impress of Quaoar rings. Credit: Paris Observator" (ScitechDaily, Space Mystery: Unexpected New Ring System Discovered in Our Own Solar System)

The thing is that the gas layer or atmosphere around the low-gravity objects is not stable. Things like energy impulses from the Sun or outside the solar system or flyby the large asteroid or cosmic impact can strip that ion curtain from around the dwarf planet. And that's why all dwarf planets in the Kuiper Belt don't have those thin atmospheres. 

Gas pressure around Pluto is <0,01 kPa, but that allows ions and anions to move freely. Ions and anions pull each other together even in low-pressure conditions. That thing can form CO2 and more complicated chemical compounds. 

The thin atmosphere that forms when those objects pull gas and ions around them remains because the solar wind will not blow those atoms and ions away.  The gas pressure is so low that it's hard to reach in the laboratory. That gas and ion layer forms a magnetic field around plutoids. And it causes things like ring systems around those objects. An example of those systems is the dwarf planet Quaoar which has a similar, but smaller ring system than Saturn. 

If those objects are closer to the Sun the solar wind blows them away. In those low-pressure conditions gas and ions are near the quantum condition. In that low-pressure condition ions and anions pull each other together. The weak sunlight gives them the energy to travel against each other. And if as an example the carbon ion faces an oxygen anion that thing can cause a chemical reaction that forms carbon dioxide. The reaction is similar to that on Earth. But some fewer ions and anions participate in it. 


https://scitechdaily.com/space-mystery-unexpected-new-ring-system-discovered-in-our-own-solar-system/


https://scitechdaily.com/webb-telescope-uncovers-carbon-dioxide-and-peroxide-on-plutos-moon-charon/


https://en.wikipedia.org/wiki/Pluto

Tuesday, September 26, 2023

Are strong planetary magnetic fields in the universe as common as we believe?

 Are strong planetary magnetic fields in the universe as common as we believe? 


The magnetic field is important for lifeforms on planets. It protects the planet's atmosphere against plasma flow from the star. If the planet doesn't have a magnetic field. That ion flow blows the atmosphere and gasses out from around the planet. 

How did Mars lose its magnetic field? That can help SETI and life search programs eliminate planetary candidates that cannot host any lifeforms. In the history of the Red Planet, it lost its lithosphere at least once. The asteroid impact sends lots of material into space. 

In that process, the Mars planet's core's rotation speed decreased. The reason for that is Mars ' mantle cooled down. The planet's core or nucleus acts like a generator. And if the rotation speed is low. 

The planet loses its magnetic field. This is the reason why the planet's size must be right. Things like gravitational fields and elements that form planets are, of course, important. But if the planet's size is too small its mantle loses its temperature faster than a large planet's mantle. 


"Did Mars ever look like this? (Credit: A.R. Bhattarai, reproduced with kind permission / Strange Map #1034 / Frank Jacobs)" (Bighink.com/How Mars lost its magnetic field — and then its oceans)



The planet's core must rotate at a different speed than the planet's shell. 


The reason for that is the small planet's shell is larger compared with the planet's volume than the large planet.  And that causes a situation, where the planet radiates infrared radiation stronger than the large planet. And that causes a decrease in temperature in the mantle. That thing decreases the rotation speed of the planet's core. And that thing decreases the power of the magnetic field.      

Magnetic field formation requires the metallic core in the planet's nucleus. Another thing that is required is that there are magnetic materials like iron in the planet's shell. If there is no magnetic material in the shell or outer mantle the magnetic field cannot form. And without that magnetic field, the planet loses its atmosphere. 

Then the core and shell must rotate at different speeds. If the rotation speed of the shell is the same as the planet's core there is no magnetic field. 

So maybe strong magnetic fields are not as common in the universe as we thought. A small planet's nucleus shines its energy faster if it has a large size. If the nucleus fills the entire planet there is a possibility that there is no mantle between it and the planet's rocky shell.        


https://bigthink.com/hard-science/mars-lost-oceans-magnetic-field/                                                                                                      

Monday, December 5, 2022

James Webb and Keck-telescopes cooperation uncovered the clouds in Titan's atmosphere.



"Images of Saturn’s moon Titan, captured by the James Webb Space Telescope’s NIRCam instrument November 4, 2022. Left: Image using F212N, a 2.12-micron filter sensitive to Titan’s lower atmosphere. The bright spots are prominent clouds in the northern hemisphere. Right: Color composite image using a combination of NIRCam filters: Blue=F140M (1.40 microns), Green=F150W (1.50 microns), Red=F200W (1.99 microns), Brightness=F210M (2.09 microns). "

(ScitechDaily.com/Webb and Keck Telescopes Team for Unprecedented Look at Saturn’s Moon Titan – “Simply Extraordinary!”)

"Several prominent surface features are labeled: Kraken Mare is thought to be a methane sea; Belet is composed of dark-colored dunes; Adiri is a bright albedo feature. Download the Titan NIRCam image from the Resource Gallery. Credit: NASA, ESA, CSA, A. Pagan (STScI). Science: JWST Titan GTO Team" (ScitechDaily.com/Webb and Keck Telescopes Team for Unprecedented Look at Saturn’s Moon Titan – “Simply Extraordinary!”)


Titan-moon is quite similar to Ganymede. The largest moon of Jupiter. The question is why does Ganymede not have a dense atmosphere? 


Titan is the biggest moon of Saturn. It's the only moon in our solar system that has a dense atmosphere. And that thing makes this moon remarkable. There are clouds in the Titan atmosphere. And that thing means there is also some kind of particles. They are forming clouds in the atmosphere of that very cold. The average temperature on Titan is 93,7K  (−179.5 °C). So those clouds can form around the small ice bites. 

There is 2.7±0.1% of methane (CH4) in the Titan atmosphere. And that thing can form methane ice in that atmosphere. 

There is no oxygen on Titan. And that denies the oxygenizing reactions. So that thing can make Titan a very interesting place. In that chemical environment, things like carbon-based molecules can stay almost forever. 

James Webb and other telescopes can uncover new details from that very extraordinary world with hydrocarbon oceans. Titan is a very dry moon, and there is no known water. But the dense atmosphere that is mainly nitrogen makes that moon very interesting. 

Because it should be like a freezer where is lots of material from the young solar system. The atmosphere protects those organic compounds from the UV radiation that comes from the Sun. So maybe the origin of life is stored in that icy moon. The nitrogen atmosphere of Titan is unique. The pressure of the atmosphere is 1,42 atm atmosphere. 

But the mass of that moon is lower than Ganymede, the largest satellite in the solar system. The surface gravity of Titan is 1.352 m/s2 (0.138 g) (0.835 Moon's) and the surface gravity of Ganymede is 1.428 m/s2 (0.146 g). The question is why Ganymede has no dense atmosphere. Maybe the distance from the Sun explains why Titan has its nitrogen atmosphere and Ganymede has not that thing. 




"Evolution of clouds on Titan over 30 hours between November 4 and November 6, 2022, as seen by Webb NIRCam (left) and Keck NIRC-2 (right). Titan’s trailing hemisphere seen here is rotating from left (dawn) to right (evening) as seen from Earth and the Sun. Cloud A appears to be rotating into view while Cloud B appears to be either dissipating or moving behind Titan’s limb (around toward the hemisphere facing away from us)." 


(ScitechDaily.com/Webb and Keck Telescopes Team for Unprecedented Look at Saturn’s Moon Titan – “Simply Extraordinary!”)

"Clouds are not long-lasting on Titan or Earth, so those seen on November 4 may not be the same as those seen on November 6. The NIRCam image used the following filters: Blue=F140M (1.40 microns), Green=F150W (1.50 microns), Red=F200W (1.99 microns), Brightness=F210M (2.09 microns). The Keck NIRC-2 image used: Red=He1b (2.06 microns), Green=Kp (2.12 microns), Blue=H2 1-0 (2.13 microns). Credit: NASA, ESA, CSA, W. M. Keck Observatory. A. Pagan (STScI). Science: Webb Titan GTO Team"


(ScitechDaily.com/Webb and Keck Telescopes Team for Unprecedented Look at Saturn’s Moon Titan – “Simply Extraordinary!”)


https://scitechdaily.com/webb-and-keck-telescopes-team-for-unprecedented-look-at-saturns-moon-titan-simply-extraordinary/


https://en.wikipedia.org/wiki/Ganymede_(moon)


https://en.wikipedia.org/wiki/Titan_(moon)


Friday, November 25, 2022

James Webb telescope gives new data about exoplanet WASP-39b.


Above: artist's vision of the exoplanet WASP-39b

WASP-39b is hot Saturn. Its mass is 0,94 times Saturn and 0,28 times Jupiter. The size of that exoplanet is 1,5 times Jupiter. 

And the reason for that is WASP-39b orbits so close to its sun. The distance to the WASP-39 system is 700 light years. 

The WASP-39 is a G-spectral class star. And that means star WASP-39 is quite similar to the Sun. 

The size of that star is slightly smaller than our Sun. And that makes the WASP-39b so interesting. There are known many gas giants that are orbiting M-type red dwarfs in close distance. 

But quite a small (read low-mass) gas planet that orbits quite a hot star very close is interesting. M-type red dwarfs have solar systems, where all planets are orbiting inside the distance of planet Mercury from their sun. But the WASP 39 is much hotter than some Gliese 581. 

The trajectory of WASP-39b is closer than the trajectory of Mercury. And the intensive heat causes the gas giant to bulge to an extremely large size. The question is why this planet didn't burn in the heat of its star. The solar wind and heat from the central star should blow the atmosphere of the planet and the planet itself away. 


"The atmospheric composition of the hot gas giant exoplanet WASP-39 b has been revealed by NASA’s James Webb Space Telescope. This graphic shows four transmission spectra from three of Webb’s instruments operated in four instrument modes. A transmission spectrum is made by comparing starlight filtered through a planet’s atmosphere as it moves in front of the star, to the unfiltered starlight detected when the planet is beside the star. Each of the data points (white circles) on these graphs represents the amount of a specific wavelength of light that is blocked by the planet and absorbed by its atmosphere."

"At upper left, data from NIRISS shows fingerprints of potassium (K), water (H2O), and carbon monoxide (CO). At upper right, data from NIRCam shows a prominent water signature. At lower left, data from NIRSpec indicates water, sulfur dioxide (SO2), carbon dioxide (CO2), and carbon monoxide (CO). At lower right, additional NIRSpec data reveals all of these molecules as well as sodium (Na). Credit: NASA, ESA, CSA, Joseph Olmsted (STScI)" (ScitechDaily.com/As Never Seen Before: NASA’s Webb Reveals an Exoplanet Unlike Any in Our Solar System)



The James Webb telescope analyzed the atmosphere of WASP-39b when it traveled over its star. ScitechDily.com describes the atmosphere of the WASP-39b like this: 

"The suite of discoveries is detailed in a set of five new scientific papers, three of which are in press and two of which are under review. Among the unprecedented revelations is the first detection in an exoplanet atmosphere of sulfur dioxide (SO2), a molecule produced from chemical reactions triggered by high-energy light from the planet’s parent star. On Earth, the protective ozone layer in the upper atmosphere is created similarly".

(ScitechDaily.com/As Never Seen Before: NASA’s Webb Reveals an Exoplanet Unlike Any in Our Solar System)

"Other atmospheric constituents detected by the Webb telescope include sodium (Na), potassium (K), and water vapor (H2O), confirming previous space- and ground-based telescope observations as well as finding additional fingerprints of water, at these longer wavelengths, that haven’t been seen before".

(ScitechDaily.com/As Never Seen Before: NASA’s Webb Reveals an Exoplanet Unlike Any in Our Solar System)

"Webb also saw carbon dioxide (CO2) at higher resolution, providing twice as much data as reported from its previous observations. Meanwhile, carbon monoxide (CO) was detected, but obvious signatures of both methane (CH4) and hydrogen sulfide (H2S) were absent from the Webb data. If present, these molecules occur at very low levels". 

(ScitechDaily.com/As Never Seen Before: NASA’s Webb Reveals an Exoplanet Unlike Any in Our Solar System)

If carbon monoxide would found in some rocky planet's atmosphere, that would be a sign of life. But the WASP-39b is mainly a gas planet. So there is some kind of photochemical reactions that are forming those molecules. 

The thing that makes those molecules interesting is that. The radiation of the WASP-39 should destroy those molecules. The radiation from that star is very powerful. And that means water and methane are surprising chemical compounds. 

The temperature in the atmosphere of that planet is about 900 C. And that means the water should turn oxygen and hydrogen at that temperature which continues until the star vaporizes its planets. And that happens when WASP-39 turns into a red giant. 

Another interesting thing is why WASP-39b is so close to its star. Maybe it is formed somewhere else, and then some cosmic catastrophe pushed it close to the G-type yellow star. 

The fact is that the mass of WASP-39b is very low for forming in its present position. The solar wind from WASP-39 should destroy that protoplanet. And that makes the WASP-39 so interesting. 


https://scitechdaily.com/as-never-seen-before-nasas-webb-reveals-an-exoplanet-unlike-any-in-our-solar-system/


https://en.wikipedia.org/wiki/Gliese_581


https://en.wikipedia.org/wiki/WASP-39b


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