How Far Away Are The Stars? - Cool Cosmos - Caltech

IPAC

Stars

  • How far away are the stars?
  • Will we ever travel to the stars?
  • Why are some stars bright and others dim?
  • Why do stars only come out at night?
  • What are constellations?
  • Why do the stars twinkle?
  • Is the Sun the largest star?
  • Which star is closest to us?
  • How many stars are there?
  • How many stars can you see at night?
  • What are stars made of?
  • What is a star?
How far away are the stars?

The stars are not all at the same distance from us. Some stars are closer and some are farther away. The closer a star is to us, the brighter it will appear. Also, stars come in a variety of sizes and brightnesses. Larger stars usually shine more brightly than smaller stars do. So, how bright a star appears in the night sky depends on its size as well as how far away from us it is. The closest star is about 25,300,000,000,000 miles (39,900,000,000,000 kilometers) away, while the farthest stars are billions of times farther than that.

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