Across
- 2. - The gaseous outer layer of the Sun's atmosphere.
- 4. - Asteroids are small, rocky objects that orbit the Sun.
- 7. - Asteroids are small, rocky objects that orbit the Sun.
- 11. - a person who is trained to travel in a spacecraft.
- 12. - The planet on which we live; the world.
- 14. - The atmosphere is a mixture of gases that surrounds the Earth.
- 15. - A celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
Down
- 1. - Small particles of matter in space.
- 3. - is how astronomers explain the way the universe began.
- 5. - The sun together with the group of celestial bodies that are held by its attraction and revolve around it.
- 6. - cause to seem small or insignificant in comparison.
- 8. - A black hole is a cosmic body of extremely intense gravity from which even light cannot escape.
- 9. - A system of two stars where one revolves around the other or both revolve around a common centre.
- 10. - When the Moon is at its closest point in its orbit to the Earth at the same time as a full Moon
- 13. - An atom is the basic building block of chemistry.