Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

	1																	2
3					4
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	6											7
8				9		10				11						12
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						14						15		16
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							20

 Check 

Across: 1. This orbits a star 3. Ten plantes form this 6. This happens at the death of a big star 7. Attractive force that holds stars together 8. Orbits a planet 11. This planet is a failed star 13. Fine material that makes stars and planets 14. The sun will end up as a ________ star 17. This was the only element in the early universe 18. Process that keeps stars alight 19. Even light can't get out of here 20. The state in which a star neither grows nor shrinks

Down: 1. Very young star giving out heat, but with no fusion happening 2. Group of billions of stars 4. Hot luminous object 5. Planets go round stars 9. Distance used in space 10. Heaviest element made in a star 12. Old star that has swelled 15. Clouds of dust 16. Product of fusion