Across
- 2. A large system of stars, stellar remnants, interstellar gas, dust, and dark matter.
- 3. The universe seen as a well-ordered whole.
- 5. A massive, luminous sphere of plasma held together by gravity.
- 6. A highly magnetized rotating neutron star that emits beams of electromagnetic radiation.
- 10. All existing matter and space considered as a whole; the cosmos.
- 13. An icy body that, when passing close to the sun, heats up and releases gases, forming a glowing coma and tail.
- 14. A stellar explosion that occurs at the end of a star's life cycle.
- 15. A celestial body orbiting a star, large enough to be rounded by its own gravity.
- 16. Occurring or situated between stars.
- 19. The curved path of a celestial object or spacecraft around a star, planet, or moon.
- 20. A small rocky body orbiting the sun, mostly found in the asteroid belt between Mars and Jupiter.
Down
- 1. Hole A region of space having a gravitational field so intense that no matter or radiation can escape.
- 4. An artificial body placed in orbit around the earth or another planet to collect information or for communication.
- 7. A vehicle, missile, or aircraft that obtains thrust from a rocket engine.
- 8. A small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction.
- 9. A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
- 11. A very energetic and distant active galactic nucleus, with a supermassive black hole at its center.
- 12. A vehicle designed for travel or operation in outer space.
- 17. A cloud of gas and dust in space, often a region where new stars are formed.
- 18. The scientific study of celestial objects, space, and the universe.