Space and More Crossword

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Across
  1. 2. an object that orbits one or more stars
  2. 4. Earth’s _______ around its axis is 24h
  3. 5. the theory that describes how stars and planets form from contracting, spinning disks of gas and dust
  4. 7. a group of planets that circle one or more stars
  5. 12. the phenomenon in which the full Moon passes into Earth’s shadow
  6. 14. a unit of measurement for the mass of stars and galaxies
  7. 16. the galaxy that includes the solar system; appears as a hazy white band in the night sky
  8. 17. a celestial body made of hot gases
  9. 18. energy that is directly converted from the energy of the Sun into electricity
  10. 19. the hard part of Earth’s surface
  11. 20. the star around which the earth orbits.
Down
  1. 1. a piece of rock moving through space
  2. 3. the surface layer of the Sun
  3. 6. a star’s total energy output per second; its power in joules per second (J/s)
  4. 8. a meteoroid that hits Earth’s atmosphere and burns up
  5. 9. a huge collection of stars, planets,gas, and dust that is held together by gravity
  6. 10. a type of neutron star that sends pulses of radiation toward Earth
  7. 11. the time it takes for an object to orbit another object
  8. 13. the phenomenon in which the shadow of the Moon falls on Earth’s
  9. 15. the monthly progression of changes in the appearance of the Moon that result from different portions of the Moon’s sunlit side being visible from Earth
  10. 16. the large round object that circles the Earth and that shines at night by reflecting light from the sun.