Is there multiple choice? I know one is the Gobi, and I think the other is the Taklamakan desert. But I'm not sure about the latter.
Pretty sure it was Galileo
Answer: show what's happening to are earth
Explanation:
Comets are cosmic snowballs of frozen gases, rock and dirt that orbit the Sun. once frozen, they're the dimensions of a small city. when a comet's orbit brings it about to the Sun, it heats up and spews dirt and gases into an enormous glowing head larger than most planets.
Hope it helps!<3