1st Semester Astronomy

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Across
  1. 5. Time when Earth's axis is tilted neither toward nor away from the Sun, resulting in equal amounts of daylight and darkness
  2. 8. The rise and fall of ocean water on Earth
  3. 10. The quality of an atmosphere above a telescope and how it affects images
  4. 11. Total movement of an object without any regard to direction
  5. 13. Invented the telescope
  6. 15. Phase of the moon when it is decreasing size and moving from full moon to new moon
Down
  1. 1. Study of celestial objects beyond Earth's atmosphere
  2. 2. Point in the orbit of a planet, comet, or any other body the most distant from the Sun
  3. 3. Point in an astronomical body's orbit when it it closest to the Sun
  4. 4. Study of how ancient cultures understood and used the sky, as well as its significance in their cultures
  5. 6. Phase of the moon when it appears to increase in size or get bigger as it moves around Earth
  6. 7. Elementary particle that carries electromagnetic radiation
  7. 9. Located in the center of our solar system
  8. 12. When the Sun's path appears to be at its furthest point from Earth's equator, either north or south
  9. 14. Proper name for "wandering stars"