SPACE Book written by: The Insiders

Edit Answers
12345678910111213141516171819202122232425
Across
  1. 1. A star that explodes with such force it blows apart, leaving only a dense core that collapses to form a neutron star or black hole
  2. 4. A planet, usually very large like Jupiter and Saturn, made mostly of dense gas with no solid surface
  3. 6. A large, spherical region surrounding the solar system but very far away, beyond Pluto
  4. 8. An 18th century French astronomer who first cataloged many of the brightest star clusters and nebulas visible in the night sky
  5. 9. The motion of a world around its axis, creating the length of its day
  6. 10. Any spherical world orbiting the sun, or another star, large enough to dominate its area of its solar system
  7. 12. A planet made mostly up of rock, such as Earth or Mars
  8. 13. The name for our own galaxy, home to our sun and Solar System
  9. 16. When the Moon is going from full to new, and its phase is shrinking each night
  10. 18. Extravehicular Mobility Unit, the technical term for the spacesuits astronauts wear
  11. 19. The name for any volume with little air in it; space is a vacuum
  12. 20. A region of matter so dense that its gravity is too strong for even light to escape
  13. 22. An icy object that can begin to vaporize when it gets close to the sun, forming long gas and dust tails
  14. 23. A giant collection of billions of stars, often with many clouds of dust and gas
  15. 24. A ball of gas large enough to shine by thermonuclear fusion
  16. 25. The end points of a world 's axis of rotation
Down
  1. 1. A robot craft sent from Earth to explore another planet or moon, or perhaps an astroid or comet
  2. 2. The circular or elliptical path of a moon around a planet
  3. 3. The term for any form of energy, such as radio, light, infrared energy, or x-rays
  4. 5. The cool, solid layer of a moon or planet, lying on top of a hotter mantle or core
  5. 7. Light waves too long for our eyes to see but that can be felt as heat
  6. 11. Light waves that are too short that our eyes to see but that, on Earth, can give a sunburn
  7. 14. The distance a beam of light travels in one year, equal to 6 trillion miles
  8. 15. measure of how much matter an object contains
  9. 17. A 'cloud' of gas and dust in the space between stars, which perhaps forms new stars, or may be blown into space by dying stars
  10. 21. when one object, or its shadow, hides another