Above: Artist's impression of exoplanet LHS 475 b Even the perfect size of an exoplanet doesn't guarantee that there are lifeforms. The exoplanet LHS 475 b is 99% of Earth. But the problem is that it doesn't have an atmosphere at all. Or an extremely thin atmosphere. In the last case, the planet captures star wind around it. That means the extremely thin atmosphere could be external. And that is a remarkable thing. The LHS 475 b orbits the red dwarf star in the Octans constellation 41 light years from Earth. Even large rocky planets can be without an atmosphere. And that expands our knowledge of planets. The exoplanet LHS 475 b is the first exoplanet found by the JWST telescope. But that planet is extremely hostile to lifeforms. So even a large size doesn't guarantee that the exoplanet has an atmosphere. But the reason for the lost atmosphere is also interesting. The lack of atmosphere can be the reason for the lack of a magnetic field. In that case, the solar wind b