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- Sungrazing_comet abstract "A sungrazing comet is a comet that passes extremely close to the Sun at perihelion – sometimes within a few thousand kilometres of the Sun's surface. Although small sungrazers can completely evaporate during such a close approach to the Sun, larger sungrazers can survive many perihelion passages. However, the strong evaporation and tidal forces they experience often lead to their fragmentation.Up until the 1880s it was thought that all bright comets near the sun were the repeated return of a single sungrazing comet. Then German astronomer Heinrich Kreutz and American astronomer Daniel Kirkwood determined that instead of the return of the same comet, each appearance was a different comet but each were related to a group of comets that had separated from each other at an earlier passage near the sun (at perihelion). Very little was known about the population of sungrazing comets until 1979 when coronographic observations allowed the detection of sungrazers. As of December 12, 2013 there are 1488 known comets that come within ~12 solar radii (~0.055 AU). This accounts for nearly one third of all comets. Most of these objects vaporize during its close approach but a comet with a nucleus radius larger than 2–3 km is likely to survive the perihelion passage with a final radius of ~1 km.Sungrazer comets were some of the earliest observed comets because they can appear very bright. Some are even considered Great Comets. The close passage of a comet to the sun will brighten the comet not only because the reflection off of the comet nucleus brightens when it is closer to the sun, but the sun also vaporizes a large amount of gas from the comet and the gas reflects more light. This extreme brightening will allow for possible naked eye observations from Earth depending on how volatile the gases are and if the comet is large enough to survive perihelion. These comets provide a useful tool for understanding the composition of comets as we observe the outgassing activity and they also offer a way to probe the effects solar radiation has on other solar system bodies.".
- Sungrazing_comet wikiPageExternalLink 1107.1857.
- Sungrazing_comet wikiPageExternalLink sungrazer.html.
- Sungrazing_comet wikiPageExternalLink sungrazer.nrl.navy.mil.
- Sungrazing_comet wikiPageExternalLink kreutz.htm.
- Sungrazing_comet wikiPageID "930437".
- Sungrazing_comet wikiPageRevisionID "606143363".
- Sungrazing_comet hasPhotoCollection Sungrazing_comet.
- Sungrazing_comet subject Category:Sungrazing_comets.
- Sungrazing_comet type Comet109251407.
- Sungrazing_comet type Comets.
- Sungrazing_comet type ExtraterrestrialObject109277686.
- Sungrazing_comet type NaturalObject100019128.
- Sungrazing_comet type Object100002684.
- Sungrazing_comet type PhysicalEntity100001930.
- Sungrazing_comet type Whole100003553.
- Sungrazing_comet comment "A sungrazing comet is a comet that passes extremely close to the Sun at perihelion – sometimes within a few thousand kilometres of the Sun's surface. Although small sungrazers can completely evaporate during such a close approach to the Sun, larger sungrazers can survive many perihelion passages.".
- Sungrazing_comet label "Cometa radente".
- Sungrazing_comet label "Cometa rasante".
- Sungrazing_comet label "Comète rasante".
- Sungrazing_comet label "Komety muskające Słońce".
- Sungrazing_comet label "Sungrazing comet".
- Sungrazing_comet label "Zonscherende komeet".
- Sungrazing_comet label "Околосолнечные кометы".
- Sungrazing_comet label "サングレーザー".
- Sungrazing_comet label "掠日彗星".
- Sungrazing_comet sameAs Comète_rasante.
- Sungrazing_comet sameAs Cometa_radente.
- Sungrazing_comet sameAs サングレーザー.
- Sungrazing_comet sameAs 선그레이징_혜성.
- Sungrazing_comet sameAs Zonscherende_komeet.
- Sungrazing_comet sameAs Komety_muskające_Słońce.
- Sungrazing_comet sameAs Cometa_rasante.
- Sungrazing_comet sameAs m.03r0lh.
- Sungrazing_comet sameAs Q3575238.
- Sungrazing_comet sameAs Q3575238.
- Sungrazing_comet sameAs Sungrazing_comet.
- Sungrazing_comet wasDerivedFrom Sungrazing_comet?oldid=606143363.
- Sungrazing_comet isPrimaryTopicOf Sungrazing_comet.