Astronomy

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Across
  1. 3. eclipse Occurs when the Moon passes directly between the Sun and Earth and blocks the sun/casts a shadow over part of Earth
  2. 5. cycle Our moon's cycle ( new moon to full moon to new) is about 1 month long.
  3. 7. Inner Planets: smaller, rocky, terrestrial
  4. 12. Planets: large, low-density gas giants, Jovian
  5. 15. Huge, hot, bright balls of gas that make light/ energy by nuclear fusion (converting Hydrogen to Helium)
  6. 17. A curved path a planet takes around a star
  7. 19. pull The force between two objects like the Earth and the Sun and the Earth and the moon.
  8. 20. Sun the largest star closest to Earth. It is a main sequence star
  9. 21. Caused by the tilt of Earth on its axis as it revolves around the Sun. Winter solstice:Dec 21, Summer Solstice: June 21
  10. 22. An escaped asteroid (meteoroid) that has hit earth's surface. (A meteor is the flash of light you see as it burns up in the atmosphere)
Down
  1. 1. An object traveling around another on a set path or orbit.
  2. 2. (of the moon) pertaining to the period during which the visible surface of the moon increases
  3. 4. All of space and everything in it
  4. 5. phases The changing appearance of the Moon as seen from Earth. New moon, waxing crescent, 1st quarter, waxing gibbous,full moon, waning gibbous,last quarter and waning crescent .
  5. 6. A small, rocky object that orbits the sun; most asteroids are located in a band between the orbits of Mars and Jupiter
  6. 8. eclipse Occurs at a full moon when Earth is directly between the moon and the sun.
  7. 9. becoming less bright, intense, or strong
  8. 10. A spinning motion of a planet about its axis.
  9. 11. A natural satellite that revolves around a planet.
  10. 13. the regular rise and fall of the ocean's surface influenced by the moon's gravity pulling on earth
  11. 14. A ball of frozen dust and rock that orbits the sun and has a tail that reflects light from sun
  12. 16. system sun, planets, and all the other objects that revolve around the sun
  13. 18. bang The theory that the universe originated in a huge explosion that released all matter and energy.
  14. 19. A collection of billions of stars, dust, and gas bound together by gravity. We live in the spiral shaped MILKY WAY
  15. 20. of Earth Earth has seasons because its axis is tilted 23.5 degrees; the tilted axis always points toward the North Star (Polaris)