Nebula formed of ionized gases that emit light of various wavelengths
Planetary nebulae, represented here by the Ring Nebula, are examples of emission nebulae.
An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet photons emitted from a nearby hot star. Among the several different types of emission nebulae are H II regions, in which star formation is taking place and young, massive stars are the source of the ionizing photons; and planetary nebulae, in which a dying star has thrown off its outer layers, with the exposed hot core then ionizing them.[1][2]
^"Nebulae." (October 2014) World of Physics, Gale In Context: Science, Doc no. CV2434500333, Retrieved May 27, 2023.
An emissionnebula is a nebula formed of ionized gases that emit light of various wavelengths. The most common source of ionization is high-energy ultraviolet...
Omega Nebula, an example of an emissionnebula The Horsehead Nebula, an example of a dark nebula. The Cat's Eye Nebula, an example of a planetary nebula. The...
silhouettes visible against the background emission of the nebula's equatorial ring. M57 may include internal N II emission lines located at the knots' tips that...
5 kpc and the current distance of VY CMa which is about 1.17 kpc as the nebula is sometimes found to have the same distance as VY CMa. "The New York Times"...
A planetary nebula is a type of emissionnebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives...
The Gum Nebula (Gum 12) is an emissionnebula that extends across 36° in the southern constellations Vela and Puppis. It lies approximately 450 parsecs...
stars, an emissionnebula (the relatively dense, reddish-pink portion), a reflection nebula (the mainly NNE blue portion), and a dark nebula (the apparent...
The Homunculus Nebula is a bipolar emission and reflection nebula surrounding the massive star system Eta Carinae, about 7,500 light-years (2,300 parsecs)...
comes from a dark absorption nebula consisting of cold molecular hydrogen and dust in front of a faint emissionnebula containing hydrogen ionized by...
The Heart Nebula (also known as the Running Dog Nebula, IC 1805, Sharpless 2-190) is an emissionnebula, 7500 light years away from Earth and located...
constellation Sagittarius. It is classified as an emissionnebula and has an H II region. The Lagoon Nebula was discovered by Giovanni Hodierna before 1654...
the nearby stars is insufficient to ionize the gas of the nebula to create an emissionnebula, but is enough to give sufficient scattering to make the...
The North America Nebula (NGC 7000 or Caldwell 20) is an emissionnebula in the constellation Cygnus, close to Deneb (the tail of the swan and its brightest...
of Creation. The Eagle Nebula lies in the Sagittarius Arm of the Milky Way. The Eagle Nebula is part of a diffuse emissionnebula, or H II region, which...
NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region emissionnebula in the constellation Cassiopeia. It lies close...
electromagnetic source Emission line, or "spectral line", a dark or bright line in an otherwise uniform and continuous spectrum Emissionnebula, a cloud of ionized...
The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emissionnebula in the constellation Cygnus, about 5000 light-years away...
reflection and emissionnebula just northwest of the Carina Nebula (or to its embedded star cluster). A small Bok globule in the Keyhole Nebula (at RA 10h 44m 30s...
The California Nebula (NGC 1499/Sh2-220) is an emissionnebula located in the constellation Perseus. Its name comes from its resemblance to the outline...
The Helix Nebula (also known as NGC 7293 or Caldwell 63) is a planetary nebula (PN) located in the constellation Aquarius. Discovered by Karl Ludwig Harding...
The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, Lobster Nebula, and the Horseshoe Nebula (catalogued as Messier 17 or M17 or NGC 6618)...
excites the atoms in the nebula, causing them to emit radiation themselves producing the emissionnebula we see. The mass of the nebula is estimated to be around...
an emissionnebula. NGC 2078 (RA 05h 39m 54s Dec −69° 44′ 54″) is an emissionnebula. NGC 2080, also called the "Ghost Head Nebula", is an emission nebula...
location where the Cone Nebula, the Stellar Snowflake Cluster and the Christmas Tree Cluster have formed in this emissionnebula. For reference, the Stellar...
2-199, LBN 667, Soul Nebula) is an emissionnebula located in Cassiopeia. Several small open clusters are embedded in the nebula: CR 34, 632, and 634[citation...
bright emissionnebula in the constellation Orion. It was discovered on February 1, 1786 by William Herschel. The Horsehead Nebula is a dark nebula silhouetted...
Global Information