Across
- 3. The point of no return in a black hole
- 5. Cooler part of a star's surface
- 7. Failed attempt at a star
- 8. Type of orbit involving a star being the center of gravitational force
- 10. Study of the smallest things in the universe
- 12. Smaller, older and weaker star
- 15. Famous tool used to observe distant celestial objects, orbiting Earth
- 16. The distance between Earth and the Sun
- 17. Outermost part of a star's atmosphere
Down
- 1. Russian name for astronaut
- 2. minimum speed needed to escape an object's gravitational pull
- 4. Radiation that is evenly distributed throughout a space
- 6. Outermost layer of the solar system
- 9. Time when day and night are of equal length
- 11. 206265 Astronomical Units
- 13. Massive force of destruction found in the center of a galaxy
- 14. Rock that falls into a planet's atmosphere