3 ms·

For a sense of scale, the Horsehead Nebula has a diameter of 7 light years which is greater than the distance of 4 light years from us to Proxima Centauri.

• mvdtnz 2y ago
  [flagged]
• Koshkin 2y ago
  From Wikipedia: Most nebulae are of vast size; some are hundreds of light-years in diameter.