Solar System and Universe

Front

What is the solar system?

Back

The system consisting of the sun, the planets, and other objects that revolve around it.

Front

What is the universe?

Back

All of space and everything in it.

Front

What is a light year?

Back

The distance that light travels in one year (about 9.46 trillion kilometers or 5.62 trillion miles).

Front

According to Kepler, how do planets orbit the sun?

Back

Planets orbit the sun in elliptical orbits.

Front

What is an astronomical unit (AU)?

Back

A unit of distance equal to the average distance between Earth and the sun (about 150 million kilometers or 93 million miles).

Front

What is the main component of the solar system?

Back

The sun.

Front

Name the planets in our solar system.

Back

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Front

What is a comet?

Back

A small celestial body made of ice, dust, and rocky material that orbits the sun.

Front

What is a galaxy?

Back

A huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.

Front

What is the Milky Way?

Back

The galaxy that contains our solar system.