The Milky Way has about 100 billion to 400 billion stars. NASA notes that the best estimates put it at roughly 100 billion stars , while other astronomy sources give a wider range because the galaxy is hard to count from inside it.

Why it’s an estimate

Astronomers can’t directly count every star because many are too faint, too far away, or hidden by dust and gas. That’s why different methods produce a range instead of one exact number.

Simple takeaway

  • Low estimate: about 100 billion stars.
  • Common range: 100 billion to 400 billion stars.
  • Exact number: not known.

The Milky Way is enormous, and even the best current estimates are still just that — estimates.