Space

3. the colossal, extremely luminous explosion of a star
4. any naturally formed celestial body that orbits a planet, a dwarf planet, or an asteroid
5. the sixth planet from the Sun and the second-largest in our solar system
6. a three-dimensional continuum containing positions and directions.
9. hole, a region in space where the pulling force of gravity is so intense that nothing—not even light—can escape
10. the seventh planet from the Sun
13. the fourth planet from the Sun in our solar system
16. it is the eighth and farthest known planet from the Sun in our solar system
17. the star at the absolute center of our solar system.

1. a chemical element, the planet nearest to the Sun in our solar system
2. highly trained individuals selected by space agencies
5. system, the Sun and all the celestial objects gravitationally bound to it, including the eight major planets, dwarf planets, moons, asteroids, and comets
7. the third planet from the Sun
8. a massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter
11. Station, an artificial, habitable spacecraft that remains in low Earth orbit for extended periods
12. a recognized area of the celestial sphere where a group of visible stars forms a perceived pattern or outline.
14. the boundless three-dimensional extent in which all objects and events occur, and the physical universe beyond Earth's atmosphere
15. a dwarf planet and the second-largest known object