> News story > Discussion questions > Answer 2

Question 2:
Why do astronomers use many different parts of the electromagnetic spectrum to view celestial objects?
Answer:

Astronomers choose to view celestial objects in different parts of the electromagnetic spectrum to uncover as much information as possible about them. Some parts of the spectrum provide information about the object that is not seen in other parts of the spectrum. For example, astronomers study black holes using gamma rays; regions of hot gas using X-rays; very hot stars using ultraviolet light; cool stars and star-forming regions using infrared light; and the cold gas found between stars with radio waves.

<< Back to discussion questions