space

1. Way - Our galaxy that contains over 200 billion stars.
3. Small rocky objects that orbit the Sun.
5. - The time when the Sun crosses the celestial equator and day and night are the same length. This happens twice a year.
10. - A period of intense activity in a galaxy where lots of stars are formed.
12. belt The region between Mars and Jupiter that contains the largest population of asteroids in our solar system.
13. The area of air and gas that envelopes Earth and other astronomical objects.
14. A scientist who studies the universe.
15. - Basic units of matter that every solid, liquid, gas and plasma is composed of.

2. - The distance light travels in one year (nearly 6 trillion miles).
4. - Planets whose orbit is within the asteroid belt, including Mercury, Venus, Earth and Mars.
6. unit A unit of measurement that’s roughly the distance from the Earth to the Sun 93 million miles.
7. A person trained to travel in a spacecraft.
8. - A system of two stars where one revolves around the other or both revolve around a common centre.
9. - A cavity in the ground of a celestial object, typically caused by explosions or meteor impact.
11. - A star that’s exhausted its own supply of carbon and burnt out.