What chart compares a star's surface temperature to its brightness?

A light year is a measure of what?

_____ is the apparent change in position of an object when viewed from different places.

This objects has such great gravity that no electromagnetic energy can escape.

The process by which a star greates energy is ____

Large mass stars have shorter lives because

What kind of star is the sun?

Differences between apparent brightness and absolute brightness are due to

Stars begin as a cloud of dust and gas called a

The Milky Way galaxy has what shape?

What is the fuel in our sun?

What characteristic are scientists trying to determine when they use a spectrograph?

When an star is moving away from us, what happens to the apparent wavelength of the light it emits?

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