What is the fate of the Earth? | Astronomy Essentials
January 15, 2021 Our Earth and sun were born together, and their fates are tied together. As our star becomes a red giant and billows outward, our planet will become a dry, scorched, uninhabitable rock. This will happen even as our Milky Way galaxy collides with the Andromeda galaxy next door. Artist’s concept of a red giant star scorching a planet in orbit around it. Image via ESO/ L. Calçada. Earth exists thanks to our sun, having formed in orbit around it from a huge cloud of gas and dust in space, 4.5 billion years ago. Likewise, the sun will ruin Earth for living things, some 5 billio...