space

3. A garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes
5. A group of stars that appears to form a pattern or picture like Orion the Great Hunter, Leo the Lion atc
8. A fundamental constituent of matter and is defined as an elementary particle
9. a chemical element with the symbol He and atomic number 2
10. when one celestial body blocks light from reaching another by moving between it and its light source
12. Rocky object revolving around the sun that is too small to be called a planet
13. Fundamental interaction which causes mutual attraction between all things with mass or energy
14. A scientist who studies the universe.

1. The name of the first artificial satellite to orbit Earth
2. An instrument that allows us to see into space
3. The sixth planet from the Sun and the second-largest in the Solar System
4. The process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles
6. An abbreviation for the largest atom smasher
7. A cloud of dust and gas in space
10. A planet outside the Solar System
11. The biggest kind of explosion that mankind has ever observed in the universe