Universe

3. a tide just after a new or full moon, when there is the greatest difference between high and low water.
6. the entire range of electromagnetic radiation
8. A scatter graph used by astronomers to classify stars by plotting their surface temperature against their brightness (luminosity)
10. a giant, glowing cloud of dust and gas (mostly hydrogen and helium) floating in space.
11. which posits that space, time, and matter emerged approximately 13.8 billion years ago from an extremely hot, dense singularity, subsequently expanding and cooling
12. a large, round celestial body that orbits the Sun
13. to move in a circle around a central point or to spin on an axis
14. They are the building blocks of the universe, with the Milky Way being our home ______.
15. moderate, "weak" tides that occur twice a month during the moon's first and third quarters
16. a massive glowing sphere of hot gas,mostly of` hydrogen and helium
17. a celestial object consisting of a nucleus of ice and dust and has a “tail” of gas and dust particles

1. Earth’s only natural satellite, a large, rocky, and dusty sphere that orbits our planet
2. the circular movement of an object around the axis
4. A cosmic "neighborhood" consisting of one star and everything held in orbit around it by gravity
5. often called a "shooting star," is a streak of light in the night sky produced when a small piece of space rock or metal
7. a wave that moves perpendicular
9. energy-carrying waves produced by the acceleration of charged particles