Solar System & Beyond Crossword

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Across
  1. 1. "The imaginary line around which an object spins, or rotates. Earth rotates around an axis that runs straight through Earth from the North Pole to the South Pole."
  2. 2. "A natural phenomenon that causes objects to be attracted to each other based on each object's mass and the distance between them."
  3. 4. Phases "The different shapes of the Moon visible from Earth."
  4. 5. "Any representation of a system used to help one understand and communicate how it works"
  5. 8. "Something that happens in a repeated and predictable way."
  6. 9. "The amount or number of an object or event relative to other objects or events."
  7. 11. The mixture of gases ("air") that surrounds a planet.
  8. 13. "A collection of stars and their solar systems that are gravitationally bound to one another."
  9. 14. "A curved path that a space object takes around a star, planet, or moon."
  10. 15. tilt "The angle of Earth's axis (approximately 23.5 degrees from perpendicular) relative to Earth's orbital plane around the Sun."
Down
  1. 1. Unit (au) the mean, or average, distance between Earth and the Sun (149,597,870,700 m)
  2. 3. A sequence of events that repeats.
  3. 6. Eclipse "When the Moon passes into Earth's shadow."
  4. 7. Eclipse "When the Moon passes between Earth and the Sun such that the Moon's shadow causes some places on Earth to experience darkness during daytime."
  5. 9. "Rockets, satellites, probes, space stations, and space shuttles that carry various tools and equipment to gather data about space and space objects"
  6. 10. axis "The imaginary line around which an object spins, or rotates. Earth rotates around an axis that runs straight through Earth from the North Pole to the South Pole."
  7. 12. System "A star and all of the objects that orbit it"