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- Necklace_Nebula abstract "The Necklace Nebula (PN G054.2-03.4) is a 12-trillion-mile-wide (2.0 light-year-wide) planetary nebula located about 15,000 light-years away in the northern constellation Sagitta. It was discovered in 2005 from the Isaac Newton Telescope Photometric H-alpha Survey (IPHAS), a ground-based H-alpha planetary nebula study of the North Galactic Plane. The Necklace Nebula is the exploded aftermath of a giant star that came too close to its Sun-like binary companion. The two stars that produced the Necklace Nebula are in a relatively small orbit about each other. They have a period of 1.2 days and a separation on the order of 5 times the radius of the Sun.About 10,000 years ago one of the aging stars ballooned to the point where it engulfed its companion star. The smaller star continued orbiting inside its larger companion, increasing the giant’s rotation rate.The bloated companion star spun so fast that a large part of its gaseous envelope expanded into space. Due to centrifugal force, most of the gas escaped along the star’s equator, producing a ring. The embedded bright knots are dense gas clumps in the ring.".
- Necklace_Nebula thumbnail Necklace_Nebula_by_Hubble.jpg?width=300.
- Necklace_Nebula wikiPageExternalLink fastfacts.
- Necklace_Nebula wikiPageID "32726818".
- Necklace_Nebula wikiPageRevisionID "573860915".
- Necklace_Nebula hasPhotoCollection Necklace_Nebula.
- Necklace_Nebula subject Category:Planetary_nebulae.
- Necklace_Nebula subject Category:Sagitta_(constellation).
- Necklace_Nebula type Cloud111439690.
- Necklace_Nebula type NaturalPhenomenon111408559.
- Necklace_Nebula type Nebula109366940.
- Necklace_Nebula type Phenomenon100034213.
- Necklace_Nebula type PhysicalEntity100001930.
- Necklace_Nebula type PhysicalPhenomenon111419404.
- Necklace_Nebula type PlanetaryNebula109394797.
- Necklace_Nebula type PlanetaryNebulae.
- Necklace_Nebula type Process100029677.
- Necklace_Nebula comment "The Necklace Nebula (PN G054.2-03.4) is a 12-trillion-mile-wide (2.0 light-year-wide) planetary nebula located about 15,000 light-years away in the northern constellation Sagitta. It was discovered in 2005 from the Isaac Newton Telescope Photometric H-alpha Survey (IPHAS), a ground-based H-alpha planetary nebula study of the North Galactic Plane. The Necklace Nebula is the exploded aftermath of a giant star that came too close to its Sun-like binary companion.".
- Necklace_Nebula label "Necklace Nebula".
- Necklace_Nebula label "PN G054.2-03.4".
- Necklace_Nebula label "項鍊星雲".
- Necklace_Nebula sameAs PN_G054.2-03.4.
- Necklace_Nebula sameAs m.0h3nhqs.
- Necklace_Nebula sameAs Q1112448.
- Necklace_Nebula sameAs Q1112448.
- Necklace_Nebula sameAs Necklace_Nebula.
- Necklace_Nebula wasDerivedFrom Necklace_Nebula?oldid=573860915.
- Necklace_Nebula depiction Necklace_Nebula_by_Hubble.jpg.
- Necklace_Nebula isPrimaryTopicOf Necklace_Nebula.
