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)

James Webb-telescope detected carbon dioxide in the exoplanet's atmosphere.

Above: Artists' impression of exoplanet Wasp-39B

Exoplanet Wasp-39b has carbon dioxide in its atmosphere. That thing is one of the possible marks of the lifeforms. But there is also the possibility that oxygen is connecting to carbon in the atmosphere of Wasp-39b. The Wasp-39b is a giant exoplanet. It's so-called hot Jupiter and the atmospheric temperature of that planet is 900 degrees Celsius. That is an extremely hot planet, so there should not be any lifeforms. 

But there is one possibility that is not what somebody wants to hear. The possibility is that the carbon dioxide is coming from the high atmosphere of some invisible target near Wasp-39b. The object can be some kind of moon near Wasp-39b. There is also water (H2O) and sodium (Na) in that planet's atmosphere. 

The Wasp-39b orbits its central star in four days. The mass of the Wasp-39b is one-quarter of Jupiter. So its mass is similar to Saturn but the size is larger than Jupiter. The reason for that is that the Wasp-39B is forming of lighter elements than Jupiter. And that means it's lighter but 1,3 times bigger than Jupiter. The question is why Wasp-39b doesn't lose its atmosphere to its star G-class star Wasp-39 ("Malmok"). That star is slightly smaller than our Sun.  

The Wasp-39b orbit time around its star is 4 days. So why Wasp-39 didn't burn that planet to an interplanetary cloud? Why Wasp-39's star wind of ions doesn't blow the Wasp-39b to space? The gravitation on Wasp-39b is not so powerful that it could keep that gas giant in one piece. And Wasp-39 is not any red dwarf. It's quite similar to our sun. 

So some people say that Wasp-39 b should not even exist. Many other exoplanets are orbiting their center star in a couple of days. But those planets are orbiting red dwarfs whose surface temperature is about 3500 celsius. Wasp-39's surface temperature is about 5000-6000K (about 4726-5726 degrees Celsius) (The temperature of the Sun's photosphere is 5772K)

There is the possibility that there is another small dwarf or so-called real planet in those solar systems. Even Earth-mass rocky planets are hard to detect if their size is very small. If the earth-mass planet forms mainly of heavier elements like iron and other heavy metals that thing means that its size is smaller than Earth if its gravitation is the same as Earth. 

http://exoplanet.eu/catalog/wasp-39_b/

https://www.nasa.gov/feature/goddard/2022/nasa-s-webb-detects-carbon-dioxide-in-exoplanet-atmosphere

https://scitechdaily.com/webb-space-telescope-detects-carbon-dioxide-in-the-atmosphere-of-an-exoplanet/

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

https://en.wikipedia.org/wiki/WASP-39b#WASP-39_(star)

Image: https://scitechdaily.com/webb-space-telescope-detects-carbon-dioxide-in-the-atmosphere-of-an-exoplanet/