HW 10: Galaxies

Front

What holds galaxies together?

Back

Gravitational attraction.

Front

What is the largest object in our solar system?

Back

The Sun.

Front

What are the main components found in galaxies?

Back

Dust, gas, and stars.

Front

How many stars are typically found in a galaxy?

Back

Billions.

Front

Order these objects from smallest to largest: Planets, solar system, galaxy, universe.

Back

Planets, solar system, galaxy, universe.

Front

What is a galaxy?

Back

A large system of stars, gas, and dust held together by gravity.

Front

What is the Milky Way?

Back

The galaxy that contains our solar system.

Front

What is the difference between a star and a planet?

Back

A star produces its own light, while a planet reflects light from a star.

Front

What is a solar system?

Back

A collection of planets and other celestial bodies that orbit a star.

Front

What is the universe?

Back

All of space and everything in it, including galaxies, stars, and planets.