Sh 2-155 (also designated Caldwell 9, Sharpless 155 or S155, or LBN529) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus.

The Cave Nebula (Caldwell 9, Sh2-155) is a diffuse emission nebula within a larger nebula complex that includes a reflection nebula, and dark nebula. This deep-sky object is located in the constellation Cepheus and lies roughly 2,400 light-years from Earth.

The Sh2-155 is an ionized H II region with ongoing star formation activity. Its estimated distance from Earth is 2,400 light-years. The name “Cave Nebula” – it’s widely known - was coined by a British amateur astronomer Patrick Moore who was the creator of Caldwell catalogue.

2024年11月8日 · Sh2-155, informally known as the “cave nebula,” is dark cloud of gas embedded in a giant emission nebula. The top edge of the cloud is illuminated by several hot, massive (OB) stars that are part of the Cepheus OB3 assocation.

SH2-155: The Cave Nebula Image Credit & Copyright: Eric Coles and Mel Helm. Explanation: This skyscape features dusty Sharpless catalog emission region Sh2-155, the Cave Nebula. In the telescopic image, data taken through a narrowband filter tracks the reddish glow of ionized hydrogen atoms.

2020年9月15日 · To find Sh2-155 in the night sky, first locate the constellation Cepheus, very close to the North Star Polaris. Once done, find the "triangle" shape on the North part of the constellation. The star you are looking for is the left base of the triangle. The Cave Nebula can be found just South of that bright star.

Sh2-155 (also catalogued BN 529, LBN 110.11+02.44, Caldwell 9, or Cave Nebula) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. Sh2-155 is an ionized H II …

2019年4月1日 · The Cave Nebula (Sh2-155) lies at distance of 2,400 light-years in the constellation Cepheus. It is a large star-forming cloud of molecular hydrogen spanning approximately 10 light-years. Hot class O and B blue supergiant stars to the upper right of the image are ionizing the cloud's hydrogen gas, causing it to glow at the hydrogen-alpha ...

2013年10月19日 · Explanation: This colorful skyscape features the dusty, reddish glow of Sharpless catalog emission region Sh2-155, the Cave Nebula. About 2,400 light-years away, the scene lies along the plane of our Milky Way Galaxy toward the …

Scope: Takahashi Sky 90 at f4.5 with field flattener/focal reducer, on the G11 Losmandy Mount. Autoguider: SBIG STV with e-finder. Filter: Astronomik Ha filter (13 nm bandpass); Type II R, G, B filter set.