GALAXIES & FORMING OF SOLAR SYSTEM

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Across
  1. 4. proposed that the Earth & planets ORBITED around the sun in ovals
  2. 8. EVERY OBJECT in the universe EXERTS a GRAVITATIONAL FORCE on every other object
  3. 10. clouds of gas & dust between stars, in
  4. 15. particles IN SPACE THAT COLLIDED and stuck together forming planets & satellites
  5. 17. grouped together in CLUSTERS bound by gravity.
  6. 19. large CLOUD OF DUST & GAS in space that
  7. 21. small pieces of rock that enter the Earth’s ATMOSPHERE.
  8. 23. philosopher used GEOCENTRIC (EARTH-CENTERED) model of the solar system to explain phases of the moon
  9. 24. large part of the Earth BLASTED into space AFTER BEING STRUCK by a planet-sized SPACE ROCK
  10. 25. CENTRAL PARTS of distant galaxies when they were
Down
  1. 1. explained that GRAVITY is the FORCE that keeps planets and satellites in ORBIT AROUND the sun
  2. 2. meteoroids that HIT the Earth’s surface.
  3. 3. MODEL COLLAPSE OF NEBULA into a FLAT ROTATING DISK due to GRAVITY FORMING A STAR AND SOLAR SYSTEM
  4. 5. DEBRIS from the Earth and the IMPACTING body began to CLUMP TOGETHER TO FORM MOON
  5. 6. probably leftover material, made from DUST & ICE, from when the solar system formed
  6. 7. proposed a HELIOCENTRIC (SUN-CENTERED) model where the Earth & planets ORBIT the sun in perfect CIRCLES.
  7. 9. QUASI-STELLAR RADIO SOURCE
  8. 11. Earth STRUCK by a planet-sized SPACE ROCK
  9. 12. force which PULLS things TOGETHER
  10. 13. added that the sun, moon and planets ORBITED (REVOLVED) around the Earth in perfect CIRCLES.
  11. 14. result from meteorite IMPACT on Earth’s SURFACE
  12. 16. larger groups of galaxy clusters.
  13. 18. oval or egg shaped
  14. 20. collection of stars, dust, & gas bound by gravity
  15. 22. the ACCUMULATION OF MATTER THAT FORMS PLANETS AND SATELLITES