Across
- 3. Does the moon revolve around the Earth?
- 7. Groups of stars are called __________.
- 8. How many Earth's can fit into 1 sun?
- 9. The series of colours is called a _________.
- 12. _________ is the coldest planet.
- 13. Stars are too _________ to go to.
- 14. flare What are burst of energy exploding from the sun's chromosphere?
- 15. A _______ is a celestial object consisting of a nucleus of ice and dust and has a “tail” of gas.
Down
- 1. Another word that astronomers use in place of triangulation is _________
- 2. ____________is one of the instruments that astronomers use.
- 4. What is the outer layer of the sun called?
- 5. What is the closest star to the Earth?
- 6. ______ are a way to measure distances not time.
- 10. There are ________ planets in our universe.
- 11. Effect A __________ _________ is a increase or decrease in frequency of sound, light or other waves.
- 12. Does the sun rotate around the Earth?