California Nebula

This was a patience shot: 126 minutes of stacking on a winter night. At first the telescope showed little more than stars, but the long red coastline slowly emerged as each exposure was added.

NGC 1499 is a huge star-forming cloud in Perseus. Hot stars born from the cloud heat and ionize its gas, making it glow red in visible light. The nebula stretches about 100 light-years from end to end, which is why keeping the entire shape in the frame matters so much.

The light in this photograph began its trip about 1,800 years before it reached the telescope. That is my favorite part of astrophotography: a quiet session outside can turn into a picture of something impossibly large and old.