Spectroscopic parallax

Spectroscopic parallax is a way for us to figure out how far away stars are from us even if we can’t see them really well. It’s kind of like when you try to guess how far away a airplane is even if it looks really small in the sky. Scientists use special tools to measure the brightness and color of a star’s light. By looking at how bright and colorful the light is, scientists can figure out how big and hot the star is. They can also tell how far away it is from us by comparing its brightness to other stars they know are closer or farther away. It’s like lining up toys from biggest to smallest to see which one is far away and which one is close. And that's how scientists use spectroscopic parallax to learn more about stars and the universe around us!