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Health and Science

Astronomy

Discover facts about the solar system, planets, NASA, astronomical measurements, the Big Bang, a star's magnitude and more.

The Universe

The Solar System

Astronomical Measurement

Space

NASA Turns 50

The Solar System: Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto
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Health and Science

More on Astronomy from Infoplease:

  • The Universe - The Universe The Big Bang: Origin of the Universe The Age and Composition of the Universe Birth and ...
  • Health and Science - Infoplease is the world's largest free reference site. Facts on weather, space, astronomy, explorations, inventions, aviation, computers, science, and the Internet.
  • The Leonid Meteor Shower - The Leonid meteor shower is a barrage of shooting stars that appears every year on or about November 17.
  • New Planets and a Larger Solar System - More planets?
  • Pluto Demoted! - Not a planet anymore
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