Question

determine whether each statement is true or false. the universe contains all space. a galaxy is a collection of astronomical bodies orbiting a central star. stars cluster together to create galaxies. light - years are used to measure distances within galaxies.

Explanation:

1. The universe encompasses all of space, time, matter, and energy, so "The universe contains all space" is true.
2. A galaxy is a collection of stars, gas, dust and dark - matter bound together by gravity. It doesn't necessarily orbit a single central star (for example, our Milky Way has a super - massive black hole at its center), so "A galaxy is a collection of astronomical bodies orbiting a central star" is false.
3. Stars, along with gas and dust, cluster together under the force of gravity to form galaxies, so "Stars cluster together to create galaxies" is true.
4. Light - years are a unit of length used to express astronomical distances, including distances within galaxies, so "Light - years are used to measure distances within galaxies" is true.

Answer:

1. True
2. False
3. True
4. True