space

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Across
  1. 3. A supermassive black hole gorging on gas at the center of a distant galaxy.
  2. 5. distance from Earth to the Sun slightly less than 93 million miles 150 million kilometers
  3. 6. Two stars that lie very close to, and are often orbiting, each other. Line-of-sight doubles are a consequence of perspective and aren’t physically related
Down
  1. 1. The changing illumination of the Moon (or other body) over time. The Moon waxes, growing more illuminated, between its new and full phases, and wanes, becoming less illuminated
  2. 2. A vast collection of stars, gas, and dust, typically 10,000 to 100,000 light-years in diameter and containing billions of stars
  3. 4. A solid body orbiting the Sun that consists of metal and rock. Most are only a few miles in diameter and are found between the orbits of Mars and Jupiter