WHAT'S INSIDE: ASTRONOMY

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

FEATURED: ASTRONOMY

Castor and Pollux, in Greek and Roman legend, sons of the Spartan queen Leda. One legend says they were twins, and that Zeus was their father.

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How Lunar Eclipses Work

The only thing that's lurking in the shadows during a lunar eclipse is the moon. When Earth's shadow blocks sunlight from directly illuminating a full moon, you're witnessing a lunar eclipse.

Our Amazing Solar System

Some of the most interesting objects in our solar system are also the smallest or largest. In addition to the sun, planets, and moons, our solar system has a variety of small objects such as asteroids, comets, stars, meteors, and moons. These have affected what has happened on Earth in many ways.

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