Many of the most interesting organs in our solar system are not a planet, but the moon that rotate them. They have active volcanoes, hydrocarbon oceans, geysers and general oceans, buried under icy piles. And, as far as we can judge, the physics of processes that produce large planets should make the formation of the moon inevitable. Given how common the planets are, our galaxy should be attended by moons.
Nevertheless, despite some teasing tips, we did not find a clear sign of the moon, rotating, rotating with an exoplanet. We have found several very young exoplanets, which have a moon that form the moon around them. Now the James Webba space telescope has received a spectrum of disk forming a ring around a giant super-Jupiter and found that it was rich in small carbon-based molecules. Despite the fact that the star, apparently, rotates on a planet, which is mainly water.
Search for discs
We are looking for exons and lunar discs using completely different methods. To find a real moon, we rely on its gravitational influence. In some moments in his orbit, he will tow his planet forward to speed up his orbit; In others, he will restrain his planet back. This introduces subtle variations when the planet arrives in front of the star from the point of view of the Earth.
(The moon should also block a little more than the light of the star at different points of its orbit, but this can easily disguise the variability of the star itself.)
Lunar discs, however, are present only in the early stages in the history of the exosolar system. They are a little similar to larger versions of Saturn's rings, but with a sufficient amount of material to condensate to the moon. During the first few million years of the history of the exosolar system, this material will ultimately become a certain combination of diffused, condensed in the moon or fell on the planet.
