Astronomy is a broad discipline covering all facets of astrophysics. In this section you can learn about the origins of the universe, black holes and other astronomical phenomena.
  • Constellations
  • Observatories
  • Stars
  • The Solar System


North Star, or Pole Star, a bright star near the north celestial pole (the point in the sky toward which the northern end of the earth's axis points).

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Venus Explained

Venus is the second planet from the sun, and is about the same size as Earth. It is a terrestrial planet, meaning it has a solid surface. But the harsh conditions on Venus make it very inhospitable. Two spacecraft, Pioneer Venus 1 and Magellan, were able to penetrate the thick atmosphere of this planet.

The Fastest Quiz You'll Ever Take

Make haste, poky person! Take this quiz to test your knowledge of the speediest stuff in the universe.

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