how are we able to see planets that are 100’s of lightyears away? By continually increasing the magnification of a telescope? How do we know anything about the planets atmosphere if it’s that far away? For example, the Corot-7b, we are told it rains rocks there.

Question

how are we able to see planets that are 100’s of lightyears away? By continually increasing the magnification of a telescope? How do we know anything about the planets atmosphere if it’s that far away? For example, the Corot-7b, we are told it rains rocks there.

In: Technology

Answer 1

A Prism is how we can see what something is made of

Simply put, you shine light through a prism and it reveals a spectrum of light waves. Based on the wave, you can determine the element present

ELI5 version:

You send 118 people into a muddy room, all with different shoes. No matter how far the muddy room is from you, you can tell who has been in the room because evereyone has different shoes, and there are different shoeprints in the room.