09 FLASHCARDS 8R Astronomy Test

Front

A group of billions of stars, gas, and dust held together by gravity

Back

Galaxy

Front

What is the name of our galaxy?

Back

The Milky Way

Front

How many stars are in a Galaxy?

Back

Billions

Front

The Sun is

Back

The only star in our solar system

Front

What do we call a group of stars that form a pattern when viewed from Earth?

Back

Constellation

Front

Which objects in the solar system are mostly made of ice?

Back

Comets

Front

What keeps the planets in orbit around the Sun?

Back

Gravity

Front

When did the universe begin?

Back

13.8 Billion Years Ago

Front

Which choice is listed from smallest to biggest? Options: Solar System, Universe, Galaxy; Galaxy, Universe, Solar System; Universe, Galaxy, Solar System; Solar System, Galaxy, Universe

Back

Solar System, Galaxy, Universe

Front

Which is true?

Back

A moon orbits a planet, A planet orbits a star