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(April 1, 1995) This eerie, dark structure, resembling an imaginary sea serpent's head, is a column of cool molecular hydrogen gas (two atoms of hydrogen in each molecule) and dust that is an incubator for new stars. The stars are embedded inside finger-like protrusions extending from the top of the nebula. Each "fingertip" is somewhat larger than our own solar system. The pillar is slowly eroding away by the ultraviolet light from nearby hot stars, a process called "photoevaporation." As it does, small globules of especially dense gas buried within the cloud is uncovered. These globules have been dubbed "EGGs" -- an acronym for "Evaporating Gaseous Globules." The shadows of the EGGs protect gas behind them, resulting in the finger-like structures at the top of the cloud. Forming inside at least some of the EGGs are embryonic stars -- stars that abruptly stop growing when the EGGs are uncovered and they are separated from the larger reservoir of gas from which they were drawing mass. Eventually the stars emerge, as the EGGs themselves succumb to photoevaporation. The stellar EGGS are found, appropriately enough, in the "Eagle Nebula" (also called M16 -- the 16th object in Charles Messier's 18th century catalog of "fuzzy" permanent objects in the sky), a nearby star-forming region 7,000 light-years away in the constellation Serpens. The picture was taken on April 1, 1995 with the Hubble Space Telescope Wide Field and Planetary Camera 2. The color image is constructed from three separate images taken in the light of emission from different types of atoms. Red shows emission from singly-ionized sulfur atoms. Green shows emission from hydrogen. Blue shows light emitted by doubly-ionized oxygen atoms.

Image # : PR95-44D
Date
Source Stellar
Author NASA on The Commons
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NASA on The Commons @ Flickr Commons

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This image was originally posted to Flickr by NASA on The Commons at https://flickr.com/photos/44494372@N05/9460796504. It was reviewed on 27 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

27 September 2015

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1 April 1995

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current13:36, 27 September 2015Thumbnail for version as of 13:36, 27 September 20151,154 × 1,127 (1.74 MB)Sumita Roy DuttaTransferred from Flickr via Flickr2Commons

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