archive / atlas record
Helix Nebula
Gas released by a Sun-like star late in its evolution.
- classification
- Planetary nebula
- system
- Milky Way
The Helix Nebula is an expanding shell of gas around a hot stellar remnant. Its name does not imply any connection to planets.
- Class
- Planetary nebula
- Location / system
- Milky Way
- Distance
- About 650 light-years from Earth
Only values with an established scientific consensus are listed. Where a quantity is uncertain or model-dependent, it is discussed in the sections below rather than stated as data.
Overview (starter entry, expanded review pending)
The Helix Nebula is an expanding shell of gas around a hot stellar remnant. Its name does not imply any connection to planets.
Multiwavelength imaging and spectroscopy
Helix Nebula is mapped in selected wavelengths. Spectral lines trace composition, ionisation and motion; inferred distance and three-dimensional structure remain measurement-dependent.
- What remains least constrained about Helix Nebula?Composition, internal structure, formation history or local environment can require different observations and may remain model-dependent.
Items above are unresolved. Hypotheses are labelled as such and are not presented as confirmed findings.
NASA/IPAC // verified 28 September 2026
CDS Strasbourg // verified 28 September 2026