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What is a constellation?

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Quick answer

A constellation is a recognizable pattern of stars in the night sky that humans have named — like Orion or the Big Dipper. The stars only appear grouped from Earth; in reality they're often vast distances apart. A named pattern of stars as seen from Earth.

Key things to understand

  1. A named pattern of stars as seen from Earth.
  2. The stars in one are usually not physically close — just aligned in our view.
  3. There are 88 officially recognized constellations.
  4. They've helped people navigate and track seasons for millennia.

People also ask

Are the stars in a constellation close together?
No — they often lie at very different distances; they only look grouped from Earth's viewpoint.
How many constellations are there?
88 are officially recognized by astronomers.
Why did people create constellations?
To map the sky, navigate, tell stories, and track seasons and time.

Part of the guide: Space & Astronomy →