Across
- 4. - Bright celestial object in the sky (4 letters, four)
- 5. - Celestial object with a tail of gas and dust (5 letters, five)
- 6. - Extraterrestrial being (5 letters, five)
- 8. - Relating to the sun (5 letters, five)
- 9. - Red planet in our solar system (4 letters, four)
- 11. - Center of our solar system (3 letters, three)
- 13. - Celestial body orbiting a star (6 letters, six)
Down
- 1. - Vast expanse beyond Earth's atmosphere (5 letters, five)
- 2. - Small rocky body orbiting the sun (8 letters, eight)
- 3. - Massive system of stars and other matter (6 letters, six)
- 5. - Universe as a whole (6 letters, six)
- 7. - American space agency (4 letters, four)
- 9. - Earth's natural satellite (4 letters, four)
- 10. - Vehicle for space travel (6 letters, six)
- 12. - Cloud of gas and dust in space (6 letters, six)