Astrobiology

2. The suitability of a planetary environment to support life.
6. The layer of gases surrounding a planet, vital for climate and life support.
7. The fourth planet from the Sun, currently explored for signs of life.
9. Earth's natural satellite, influencing tides and possibly supporting life.
10. Ribonucleic acid, involved in protein synthesis and gene expression.
12. Celestial bodies orbiting stars that may support life.
13. The star at the center of our Solar System, providing energy for life on Earth.
14. A fissure in the ocean floor emitting hot, mineral-rich fluids.
16. A vast system of stars, gas, dust, and dark matter.
17. The condition that distinguishes organisms from inorganic matter.
18. Deoxyribonucleic acid, the molecule carrying genetic instructions for life.

1. Organisms capable of thriving in extreme environments.
3. An indicator of past or present life.
4. Acids Building blocks of proteins, essential for life processes.
5. The process by which plants and some bacteria convert sunlight into energy.
8. Luminous celestial objects primarily composed of hydrogen and helium.
9. A region around a magnetic material or a moving electric charge where the force of magnetism acts.
10. Energy emitted as electromagnetic waves or particles, influencing habitability.
11. A universal solvent essential for life processes.
15. A gas essential for aerobic respiration and the survival of many organisms.