Gallery

Emission nebula

M42 Orion Nebula with a Seestar S30

The raw stack on the left, auto-stretched; the image Stelora finished from it on the right. Drag to compare.

Telescope
Seestar S30
Frames
244 × 30 s
Total integration
2 h 2 min
Stacking
Stacked by the telescope
Processed with
Pipeline 0.10.0
Data
AbdurAstro (free Seestar practice data)

About M42

The Orion Nebula is a cloud of gas where new stars are forming, about 1,300 light-years away. It is the closest region of massive star formation to us, and bright enough to see without a telescope as the fuzzy middle "star" in the sword below Orion’s belt.

It is a winter target in the northern hemisphere and a summer one in the southern, best in the evening sky around January. It sits close to the celestial equator, so it rises high enough from almost anywhere people live. About one degree across, it fits a Seestar S30’s field, with the Running Man nebula above it.

It is the easiest nebula to start with and one of the hardest to finish well. The core around the Trapezium stars is far brighter than the faint outer clouds, so a stretch that shows the outer clouds burns the core to white. Pipeline 0.9.0 and 0.10.0 were both about this core; the changelog says what changed.

Not sure where the file is? Where your Seestar or Dwarf 3 saves its FITS files.