Across
- 3. Common center mass around which a solar system orbits
- 5. A star that leads or guides
- 6. Travel between galaxies
- 7. When a planet's subsolar point passes through its equator
- 8. Time after sunset or before sunrise when the sky isn't entirely dark
- 9. Instance of deviating from a normal state
- 11. Measure of how much an orbit deviates from being circular
Down
- 1. Tidal effect caused by intense gravitational fields
- 2. A medieval tool to measure a star's altitude
- 4. A bright explosion of a star
- 10. The point in the sky that is directly overhead