19 Aug 2021
The Helix Nebula is formed by an intermediate to low-mass star, which sheds its outer layers near the end of its evolution. Gases from the star in the surrounding space appear, from our vantage point, as if we are looking down a helix structure.
NGC 7293
32 credit
Filter | Avg Exp (s) | Total Exposure | Subframes |
|---|---|---|---|
| Halpha | 932 | 22h | 85 |
| Luminance | 321 | 7h35m | 85 |
| Red | 184 | 4h20m | 85 |
| Green | 180 | 4h15m | 85 |
| Blue | 194 | 4h35m | 85 |