Celestial Phenomena

Across

3. Highest point reached by a celestial body

5. Relating to the universe beyond Earth

6. Release of gases into the atmosphere

7. Dark area on the sun s surface

11. Resident of the Red Planet

12. Zodiac sign symbolized by a bull

14. Point of entry to a building

15. Apparent shift in object position

Down

1. Flat elevated landform with steep sides

2. Stage in a process or cycle

4. Hunter constellation visible in winter sky

8. Blazing and intense fiery place

9. Shortcut through space time continuum

10. Spacecraft designed to touch down gently

13. Massive system of stars and planets