(The Moon is currently about 384,000 km or 60 Earth radii away from Earth, which is about fifteen times further away than it was when it first formed.) The Moon probably couldn't have formed closer than 3 Earth radii because tidal forces from the Earth would just pull it apart again, and it is unlikely that the impact could have ejected material ...
About 78% of Earthâs atmosphere is made up of nitrogen. Credit: NASA We might commonly think of Earth as having an oxygen-dominated atmosphere, but in reality the molecule makes up only a fifth of our air.
The planet s burning temperatures are greatly a result of the planet s atmosphere. The planet s atmosphere is made up of thick yellow clouds that cover up the planet s surface. Similar to the moon, Venus is a plain rock. The poisonous atmosphere would instantly kill off any breathing creature that would dare enter the planet. Also, the greenhouse effect is strongest in Venus out of all the planets. This intense heat also comes from the clouds that make Venus s surface invisible. These clouds are mostly made up of carbon dioxide, which makes a greenhouse effect that traps the Sun s heat.