Science & Space Crossword — 9 September 2026

Across

1. 5. Path followed by a celestial body around a star or planet (7)
2. 6. Tiny organism, often used in biotechnology and medicine. (7)
3. 8. Celestial bodies orbiting stars in our universe (7)
4. 10. Metal known for its high melting point and strength (8)
5. 12. This gas forms a protective layer in the atmosphere. (5)
6. 13. Building block of chemical compounds and substances. (8)

Down

1. 1. Layer of gases surrounding a celestial body (11)
2. 2. Process that powers the sun through nuclear reactions. (6)
3. 3. Group of stars or galaxies held together by gravity. (7)
4. 4. A push or pull that causes an object to move (5)
5. 7. Type of spacecraft for crew and cargo transport (7)
6. 9. Pertaining to the smallest unit of a chemical element. (6)
7. 11. Prefix indicating one billionth, often used in technology. (4)