![]() ![]() The date and time the release content became public.Ī brief description of the methods used to convert telescope data into the color image being presented. The primary individuals and institutions responsible for the content. The camera filters that were used in the science observations. The date(s) that the telescope made its observations and the total exposure time. ![]() The science instrument used to produce the data. "PI" refers to the Principal Investigator. Science Team: The astronomers who planned the observations and analyzed the data.Proposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.The physical size of the object or the apparent angle it subtends on the sky. Interstellar distances can also be measured in parsecs. Solar system are usually measured in Astronomical Units (AU). ![]() The physical distance from Earth to the astronomical object. One of 88 recognized regions of the celestial sphere in which the object appears. Right ascension – analogous to longitude – is one component of an object's position.ĭeclination – analogous to latitude – is one component of an object's position. Yusef-Zadeh (Northwestern Univ.)Ī name or catalog number that astronomers use to identify an astronomical object. This image was produced by the Hubble Heritage Team.Ĭredits NASA, ESA, and The Hubble Heritage Team ( AURA/ STScI) Acknowledgment: F. The images were taken with the Wide Field Planetary Camera 2 onboard Hubble in mid-summer 20. The science team, composed of Farhad Yusef-Zadeh (Northwestern U.), John Biretta (STScI), Bob O'Dell (Vanderbilt U.), and Mark Wardle (Macquarie U.), took exposures in filters that transmit light emitted by oxygen, hydrogen, and sulfur ions. The Hubble image of the Trifid Nebula has given astronomers insight into the nature of the interaction of gaseous, dusty and stellar material in an area where dust, gas clouds, and new and old stars coexist. Star formation is no longer occurring in the immediate vicinity of the conspicuous group of bright O-type stars, because their intense radiation has blown away the gas and dust from which stars are made. This wispy structure has a bluish color because it is made up of glowing oxygen gas that is evaporating into space. At the upper left tip of this pillar, there is a complex filamentary structure. The group of bright O-type stars at the center of the Trifid illuminates a dense pillar of gas and dust, seen to the right of the center of the image, producing a bright rim on the side facing the stars. Many astronomers studying nebulae like the Trifid are focusing their research on the ways that waves of star formation move through such regions. These stars, which astronomers classify as belonging to the hottest and bluest types of stars called type "O," are releasing a flood of ultraviolet radiation that dramatically influences the structure and evolution of the surrounding nebula. This new image from the Hubble Space Telescope offers a close-up view of the center of the Trifid Nebula, near the intersection of the dust bands, where a group of recently formed, massive, bright stars is easily visible. The Trifid lies about 9,000 light-years (2,700 parsecs) from Earth, in the direction of the constellation Sagittarius. It is called the Trifid because the nebula is overlain by three bands of obscuring interstellar dust, giving it a trisected appearance as seen in small telescopes. The Trifid Nebula, cataloged by astronomers as Messier 20 or NGC 6514, is a well-known region of star formation lying within our own Milky Way Galaxy.
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