Across
- 3. the imaginary line that a planet rotates on
- 5. how many stars are formed and is similar to how sedimentary rock forms
- 6. reflects the surface temperatures and absolute brightness of stars
- 9. the distance light travels in a year
- 13. how bright a star really is
- 16. the total blocking of one object by another in space
- 17. never changes no matter what planet you are on
- 18. 's gravity is so strong, not even light can escape
- 19. How an object's position appears to change from different planets and viewpoints
- 20. can cause a white dwarf or a black hole
- 22. the remains of a star post-supernova
Down
- 1. a large cloud of gas and dust in space
- 2. a galaxy with a black hole at the center
- 4. a star system with two stars
- 7. now known to be the shape of the planet's orbit
- 8. changes depending on the force of gravity on a planet
- 10. the star left after a red giant dies
- 11. is a property of matter by which it remains at rest or in uniform motion unless acted upon by an outside force
- 12. happens when the loops in sunspot regions suddenly connect
- 14. how stars produce their energy
- 15. separates light into colors and makes an image of the resulting spectrum
- 20. examples include the sun, Sirius, and Betelgeuse
- 21. keeps us on the ground