Space Science Vocabulary

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Across
  1. 3. A large, nearly round object that orbits a star and has cleared most other objects from its orbital path. Earth is a planet.
  2. 6. The outermost layer of the Sun's atmosphere. It is very hot and can be seen during a total solar eclipse.
  3. 7. A round object that orbits the Sun but has not cleared other objects from its orbital path. Pluto is an example.
  4. 8. A model of the solar system in which Earth is considered to be at the center and other objects appear to orbit Earth.
  5. 9. A small piece of rock or metal traveling through space.
  6. 12. A small object made mostly of ice, dust, and rock that orbits the Sun. When it gets close to the Sun, it can develop a glowing head and tail.
  7. 14. A model of the solar system in which the Sun is at the center and planets orbit the Sun.
  8. 15. A natural object that orbits a planet or dwarf planet. Earth's Moon is Earth's natural satellite.
Down
  1. 1. The star at the center of our solar system. It provides Earth with light and heat.
  2. 2. The Sun and all of the objects that orbit it, including planets, dwarf planets, moons, asteroids, and comets.
  3. 4. A rocky object that orbits the Sun. Most asteroids are found in the asteroid belt between Mars and Jupiter.
  4. 5. A sudden, powerful burst of energy and light from the Sun. Solar flares can release large amounts of energy into space.
  5. 10. A force that pulls objects toward each other. Earth's gravity keeps us on the ground and keeps the Moon in orbit.
  6. 11. A stream of charged particles flowing outward from the Sun into space.
  7. 13. A dark-looking, cooler area on the Sun's surface caused by strong magnetic activity.