SPACE

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Across
  1. 4. The daily disappearance of the sun below the horizon.
  2. 5. The region beyond the earth’s atmosphere containing the other planets of the solar system, stars, galaxies, etc.
  3. 7. The force of attraction by which terrestrial bodies tend to fall toward the center of the Earth.
  4. 8. The planet on which human beings live.
Down
  1. 1. Any of the eight celestial bodies revolving around the Sun.
  2. 2. The people who serve on a spacecraft.
  3. 3. The rise of the sun above the horizon in the morning.
  4. 4. A vehicle designed for travel in space.
  5. 6. A person trained for travelling in space.