themeatbridge, 1 year ago

It’s worth mentioning that we can’t “see” any exoplanets at all. We know they are there by the gravitational lensing that occurs when a planet passes in front of the star it orbits. Once we calculate the position and orbit, we can track the planets and listen for any radio waves or radiation that would indicate life. We are also getting better as guessing the chemical composition of the planets, but it’s not like we can scan the surface for plants and animals.