Across
- 5. The area of air and gas that envelopes Earth and other astronomical objects.
- 9. A system of two stars where one revolves around the other or both revolve around a common centre.
- 10. A group of stars that form a pattern.
Down
- 1. The universe.
- 2. A place in space where the pull of gravity is so strong that even light can’t get out.
- 3. A cavity in the ground of a celestial object, typically caused by explosions or meteor impact.
- 4. Small particles of matter in space.
- 5. Basic units of matter that every solid, liquid, gas and plasma is composed of.
- 6. The main theory explaining how the universe started. It states that 13.8 billion years ago, space expanded quickly to form the atoms that would produce stars and galaxies.
- 7. Objects made of frozen gases, rock and dust that orbit the Sun.
- 8. galaxy Small dim galaxies that are abundant in the universe.
- 9. A star that’s exhausted its own supply of carbon and burnt out.