NGSS.MS-ESS1-3

Front

What is an astronomical unit (AU)?

Back

The average distance between the Earth and the Sun.

Front

Why do other stars appear smaller than the Sun?

Back

They are so far away.

Front

Which distance is larger: 1 astronomical unit or 1 light-year?

Back

1 light-year (LY) is larger.

Front

What is the distance of 1 light-year in kilometers?

Back

1 light-year = 9.5 x 10^12 km.

Front

What is the largest celestial body in our Solar System?

Back

The Sun.

Front

Define a light-year.

Back

A light-year is the distance that light travels in one year.

Front

What is the average distance from the Earth to the Sun in kilometers?

Back

Approximately 149.6 million kilometers.

Front

What is the significance of the astronomical unit in astronomy?

Back

It is used to measure distances within our solar system.

Front

How does the brightness of a star relate to its distance from Earth?

Back

The farther a star is, the dimmer it appears.

Front

What is the relationship between the size of a star and its distance from Earth?

Back

Larger stars can appear smaller if they are very far away.