Stars and Galaxies

Front

What is a star's color related to?

Back

A star's color is related to its surface temperature; blue stars are hotter, while red stars are cooler.

Front

What is apparent brightness?

Back

Apparent brightness is how bright a star appears from Earth, which can be affected by distance.

Front

What does the Hertzsprung-Russell diagram show?

Back

The Hertzsprung-Russell diagram shows the relationship between a star's absolute brightness and its temperature.

Front

What is luminosity?

Back

Luminosity is the total amount of energy a star emits per second, regardless of its distance from Earth.

Front

How does distance affect a star's apparent magnitude?

Back

The farther a star is from Earth, the dimmer it appears, decreasing its apparent magnitude.

Front

What is the difference between apparent brightness and absolute brightness?

Back

Apparent brightness is how bright a star appears from Earth, while absolute brightness is how bright it would appear at a standard distance of 10 parsecs.

Front

What is a blue star's temperature compared to a red star?

Back

A blue star has a higher surface temperature than a red star.

Front

What happens to a star's brightness if it is closer to Earth?

Back

If a star is closer to Earth, it appears brighter than if it were farther away.

Front

What is the significance of the Sun in relation to other stars?

Back

The Sun is one of billions of stars and serves as a reference point for studying other stars.

Front

What is the relationship between a star's temperature and its color?

Back

A star's temperature determines its color; hotter stars appear blue, while cooler stars appear red.