Planetary NebulaCharles LilloM97, Planetary NebulaComment

The Owl Nebula M97

Planetary NebulaCharles LilloM97, Planetary NebulaComment
The Owl Nebula M97
m97Bi-color-8-hrs.jpg

The Owl Nebula (also known as Messier 97, M97 or NGC 3587) is a planetary nebula located approximately 2,030 light years away in the constellation Ursa Major.

The nebula is approximately 8,000 years old. It is approximately circular in cross-section with a little visible internal structure. It was formed from the outflow of material from the stellar wind of the central star as it evolved along the asymptotic giant branch.

The nebula is arranged in three concentric shells, with the outermost shell being about 20–30% larger than the inner shell. The owl-like appearance of the nebula is the result of an inner shell that is not circularly symmetric, but instead forms a barrel-like structure aligned at an angle of 45° to the line of sight.

The nebula holds about 0.13 solar masses of matter, including hydrogen, helium, nitrogen, oxygen, and sulfur; all with a density of less than 100 particles per cubic centimeter.

This image is 8.5 hours of accumulated HA and OIIII data. Combined using HA for red a mix of OIII and HA for green and OIII for blue.

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Planetary Nebula, NebulaCharles LilloNebula, Planetary Nebula, Medusa nebulaComment

Medusa Nebula AKA Abell 21 and Sharpless 2-274.

The Medusa Nebula is a planetary nebula in the constellation of Gemini. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell, who classified it as an old planetary

Planetary Nebula, NebulaCharles LilloNebula, Planetary Nebula, Medusa nebulaComment
Medusa Nebula AKA Abell 21 and Sharpless 2-274.
Planetary NebulaCharles LilloOwl Nebula, vixen VC200L, Planetary Nebula, HC, sBigComment

The OWL Nebula

The Owl Nebula is a planetary nebula located approximately 2,030 light years away in the constellation Ursa Major.This object is known by the catalogue identifiers Messier Object 97 (M97) and NGC 3587. It was discovered by French astronomer Pierre Méchain on February 16, 1781 When William Parsons, 3rd Earl of Rosse observed the nebula in 1848, his hand-drawn illustration resembled an owl's head. It has been known as the owl nebula ever since.

Planetary NebulaCharles LilloOwl Nebula, vixen VC200L, Planetary Nebula, HC, sBigComment
The OWL Nebula