Identifying Elements in Stars
By Conor McCarty and Charlie Miller
This helps astronomers very much because it can show us what elements stars are made up of. Also the what the atmospheres of distant planets are comprised of.
We also use spectroscopes to see how far away stars and galaxies are from Earth. We can see that because you can see how red shifted or blue shifted different stars are. The more red shifted they are the farther away and the opposite with blue shift.
Identifying the Elements
For example one of the gases found in stars, Hydrogen, shows up as a purple line at 410 nm, a blue line at 434 nm, a teal line at 486 nm, and a red line at 656 nm when looking through a spectroscope.