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What is the fuel in our sun?
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
What chart compares a star's surface temperature to its brightness?
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
Differences between apparent brightness and absolute brightness are due to
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
When an star is moving away from us, what happens to the apparent wavelength of the light it emits?
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
What characteristic are scientists trying to determine when they use a spectrograph?
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
A light year is a measure of what?
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
The process by which a star greates energy is ____
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
_____ is the apparent change in position of an object when viewed from different places.
parallax
star's composition
hydrogen
distance
the distance from Earth
a Hertzsprung-Russell diagram
nuclear fusion
in increases
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