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Ring Nebula

Explanation

  1. The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf.
    • also known as Messier 57, M57, NGC 6720
  2. The Ring Nebula in Barnard's Galaxy has the official designation of Hubble 1925 III as it was the third object recorded in Hubble's 1925 paper, N.G.C. 6822, A Remote Stellar System. It includes areas of bright H II emission. In Paul W. Hodge's 1977 paper it was designated Hodge 4.
    • also known as 環狀星雲

Printed dictionaries and other books with definitions for Ring Nebula

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Google previewVoyages Through the Universe, Media Update (2016)

by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through ...

Google previewExplorations, An Introduction to Astronomy, Volume 2 Stars and Galaxies (2016)

by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through ...

Google previewPATHWAYS TO ASTRONOMY COL1 VL1 (2016)

by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in.

Google previewCosmic Perspective (2016)

by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through ...

Google previewAstronomy, Journey to the Cosmic Frontier -- Galaxies and Starry Nights 3. 1 CD-ROM (2016)

by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through ...

Google preview21st Century Astronomy (2016)

Astronomy, Astronomy by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through ...

Google previewAstronomy Today, Volume 2 (2016)

Astronomy, Astronomy by CTI Reviews

Ring Nebula: The Ring Nebula is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through ...

Google previewThe Facts on File Dictionary of Astronomy (2009)

by John Daintith, William Gould

ring nebula A ring or arc of ...

Google previewDictionary of Astronomy and Astronautics (1959)

by Armand Spitz, Frank Gaynor

The best known ones are the Ring Nebula in Lyra and the Owl Nebula in Ursa Minor. planetary orbit The path in which a planet revolves around the sun. (see KEPLER'S LAWS.) ...

Google previewSpace Visual Encyclopedia (2016)

by DK

The Ring Nebula—the faint remains of a star that puffed off its atmosphere in its death throes—is visible through a telescope. Kornephoros Vega M13 DATA FILE Ring Nebula SIZE RANKING: 52nd DATA FILE SIZE RANKING: 5th BRIGHTEST ...

Google previewEncyclopaedia Britannica Almanac 2010 (2010)

by Encyclopaedia Britannica, Inc.

Lyra also contains the Ring Nebula (M57). Rigel is the brightest star in Orion; M42 (the Great Nebula) resides in Orion. The constellation contains stars of the Great Square of Pegasus. Piscis Austrinus Sagitta Serpens Triangulum Ursa Major ...

Google previewNelson's Encyclopaedia (1907)

Everybody's Book of Reference ...

Ring nebula in Lyra. , (Lick Observatory:) 3. The nebulae in Negrito Types.

Google previewFirefly Astronomy Dictionary (2003)

by John Woodruff

Ring Nebula The planetary nebula M57, 4100 light years away in the constellation Lyra, also known as NGC 6720. It appears as a hollow ellipse; in three dimensions it is shaped not like a spherical shell but like a toroid, or ring doughnut.

Google previewA Dictionary of Astronomy (2012)

by Ian Ridpath

Ring Nebula pupil to be the same as the observer's maximum dark-adapted pupil size. If the maximum pupil size is taken to be 7.5mm, the magnification will be approximately 0.13 times the aperture in millimetres. This is usually provided ...

Google previewConcise Dictionary Of Physics (2012)

by V&S Publishers' Editorial Board

Ring nebula A famous planetary nebula (M57, NGC 6720) in the constellation Lyra. Ripple An a.c. component or a periodic fluctuation of a direct current or voltage. Ripple is generally the result of inadequate filtering of the voltage produced by ...

Google previewAcademic Press Dictionary of Science and Technology (1992)

by Christopher G. Morris, Academic Press

Ring Nebula Astronomy, an ellipsoidal planetary nebula in Lyra, so named because in telescopes and astrophotos it appears like a smoke ring. Also, M 57. ring Of quotients Mathematics. 1. let 5 be a multiplicative subset of a commutative ring ...

Google previewScience Dictionary (2012)

by Seymour Simon

Ring Nebula A famous nebula that looks like a smoke ring in the constellation Lyra. ringworm A common, contagious disease of the skin, hair, or nails caused by a fungus. Ringworm appears on the skin as a ringshaped, reddish patch.

Google previewEncyclopedia of Space and Astronomy (2009)

by Joseph A. Angelo

M57 6720 Ring Nebula in constellarion ...

Google previewThe Century Dictionary and Cyclopedia: Dictionary (1897)

by William Dwight Whitney, Benjamin Eli Smith

Ring nebula. See nebula.— Ring of an anchor, that part of an anchor to which the cable is fastened.— Ring of Venus, in palmistry, a curved line running below the mountB of Apollo and Saturn. See mount*, 5.— Ring settlement, in business ...

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