The conversation between human and AI assistant.
Why there is no atmosphere around many planets then why does earth has atmosphere?
I would like to know why some planets don't have an atmosphere, while Earth does?
Many factors determine whether an object has an atmosphere, such as its size, composition, and temperature. For example, gas giants like Jupiter and Saturn have thick atmospheres primarily made up of hydrogen and helium, while rocky planets like Earth have atmospheres that typically consist of nitrogen, oxygen, and trace amounts of other gases.