space

5. A group of stars that appears to form a pattern or picture like Orion the Great Hunter, Leo the Lion atc
6. An instrument that allows us to see into space
9. A scientist who studies the universe.
11. The process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles
12. A cloud of dust and gas in space
14. The sixth planet from the Sun and the second-largest in the Solar System
16. Rocky object revolving around the sun that is too small to be called a planet

1. when one celestial body blocks light from reaching another by moving between it and its light source
2. a chemical element with the symbol He and atomic number 2
3. A planet outside the Solar System
4. The name of the first artificial satellite to orbit Earth
7. suit A garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes
8. Fundamental interaction which causes mutual attraction between all things with mass or energy
10. The biggest kind of explosion that mankind has ever observed in the universe
13. An abbreviation for the largest atom smasher
15. A fundamental constituent of matter and is defined as an elementary particle