Question

stars often cluster together to form larger structures called galaxies. a galaxy also contains the stars planetary systems, as well as the gas and dust found between the stars. the galaxy that contains the solar system is called the milky way. the milky way is a large spiral galaxy that houses about 100 billion stars. average - sized galaxies contain about 100 million stars. supergiant galaxies, the largest galaxies in the universe, can contain over 100 trillion stars! the milky way galaxy select the true statements. average - sized galaxies have over 1 trillion stars. supergiant galaxies contain approximately 100 million stars. galaxies contain stars and planets. planets cluster together to form galaxies.

Explanation:

The text states that average - sized galaxies contain about 100 million stars, so the first statement is false. Supergiant galaxies can contain over 100 trillion stars, not 100 million, so the second statement is false. A galaxy contains stars and their planetary systems (which include planets), so the third statement is true. Stars, not planets, cluster together to form galaxies, so the fourth statement is false.

Answer:

Galaxies contain stars and planets.