Across
- 2. A planet is an astronomical object that orbits a star.
- 3. Regions of the interstellar medium made up of gases as well as chemical elements in the form of cosmic dust.
- 6. Cosmic snowballs of frozen gases, rock, and dust that orbit the Sun.
- 8. A rocky celestial body, smaller than a planet and larger than a meteoroid.
Down
- 1. A gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
- 4. The remnants of a large star that dies in a supernova explosion.
- 5. A newborn galaxy or that source of energy that occurs in the black hole at the center of these newborn galaxies
- 7. The most widely recognized astronomical objects