martinsastro

Astronomy for all.
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Lester.jpg

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Dargo to Licola


IMG_0518.jpg

18 files, last one added on May 21, 2016
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Camper trailer files.



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CentAfinal2G.jpgCentaurus A1138 views10 X 5 Min RGB and 15 X 10 Min Luminance.
Martin
Swan_done.jpg
Swan_done.jpgSwan nebula.606 viewsThe Omega Nebula, also known as the Swan Nebula and the Horseshoe Nebula[2] (catalogued as Messier 17 or M17 and as NGC 6618) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way.

The Omega Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter. The total mass of the Omega Nebula is an estimated 800 solar masses.

A open cluster of 35 stars lies embedded in the nebulosity and causes the gases of the nebula to shine due to radiation from these hot, young stars.
Martin
catspaw.jpg
catspaw.jpgCats paw nebula.863 viewsNGC 6334 (also known as the Cat's Paw Nebula , Bear Claw Nebula and Gum 64) is an emission nebula located in the constellation Scorpius.[2] It was discovered by astronomer John Herschel in 1837, who observed it from the Cape of Good Hope in South Africa.Martin
etaha-2.jpg
etaha-2.jpgEta Carinae in HA.625 viewsThis stellar system is currently one of the most massive that can be studied in great detail. Until recently, Eta Carinae was thought to be the most massive single star, but it was recently demoted to a binary system.[7] The most massive star in the Eta Carinae multiple star system has more than 100 times the mass of the Sun. Other known massive stars are more luminous and more massive.

Stars in the mass class of Eta Carinae, with more than 100 times the mass of the Sun, produce more than a million times as much light as the Sun. They are quite rare — only a few dozen in a galaxy as big as the Milky Way. They are assumed to approach (or potentially exceed) the Eddington limit, i.e., the outward pressure of their radiation is almost strong enough to counteract gravity. Stars that are more than 120 solar masses exceed the theoretical Eddington limit, and their gravity is barely strong enough to hold in their radiation and gas.

Eta Carinae's chief significance for astrophysics is based on its giant eruption or supernova impostor event, which was observed around 1843. In a few years, Eta Carinae produced almost as much visible light as a supernova explosion, but it survived. Other supernova impostors have been seen in other galaxies, for example the false supernovae SN 1961v in NGC 1058[8] and SN 2006jc in UGC 4904,[9] which produced a false supernova, noted in October 2004. Significantly, SN 2006jc was destroyed in a supernova explosion two years later, observed on October 9, 2006.[10] The supernova impostor phenomenon may represent a surface instability[11] or a failed supernova. Eta Carinae's giant eruption was the prototype for this phenomenon, and after nearly 170 years the star's internal structure has not fully recovered.
Martin
Lagoon.jpg
Lagoon.jpgLagoon nebula.776 viewsThe Lagoon Nebula is estimated to be between 4,000-6,000 light-years from the Earth. In the sky of Earth, it spans 90' by 40', translates to an actual dimension of 110 by 50 light years. Like many nebulas, it appears pink in time-exposure color photos but is gray to the eye peering through binoculars or a telescope, human vision having poor color sensitivity at low light levels. The nebula contains a number of Bok globules - dark, collapsing clouds of protostellar material - the most prominent of which have been catalogued by E. E. Barnard as B88, B89 and B296. It also includes a funnel-like or tornado-like structure caused by a hot O-type star that pours out ultraviolet light, heating and ionizing gases on the surface of the nebula. The Lagoon Nebula also contains at its centre a structure known as the "Hourglass Nebula" (so named by John Herschel), which should not be confused with the better known Hourglass Nebula in the constellation of Musca. In 2006 the first four Herbig-Haro objects were detected within the Hourglass, also including HH 870. This provides the first direct evidence of active star formation by accretion within it.Martin
horsephotobucket.jpg
horsephotobucket.jpgHorsehead nebula.730 viewsThe Horsehead Nebula (also known as Barnard 33 in bright nebula IC 434) is a dark nebula in the constellation Orion. The nebula is located just below (to the south of) Alnitak, the star farthest left on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. The Horsehead Nebula is approximately 1500 light years from Earth. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which is similar to that of a horse's head when viewed from Earth. The shape was first noticed in 1888 by Williamina Fleming on photographic plate B2312 taken at the Harvard College Observatory.

The red glow originates from hydrogen gas predominantly behind the nebula, ionized by the nearby bright star Sigma Orionis. The darkness of the Horsehead is caused mostly by thick dust, although the lower part of the Horsehead's neck casts a shadow to the left. Streams of gas leaving the nebula are funneled by a strong magnetic field. Bright spots in the Horsehead Nebula's base are young stars just in the process of forming.
Martin
1123_and_1124.jpg
1123_and_1124.jpgAr1123 and 1124.576 viewsMartin
Jen6.jpg
Jen6.jpg485 viewsMartin

Last additions
IMG_0518.jpg
IMG_0518.jpgnice view591 viewsnice viewMartinMay 21, 2016
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IMG_0517.jpgARB Kev662 viewsARB Kev.MartinMay 21, 2016
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IMG_0516.jpg330 viewsKev's CarMartinMay 21, 2016
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IMG_0515.jpg335 viewsJacki and carMartinMay 21, 2016
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IMG_0514.jpg336 viewsAlex's carMartinMay 21, 2016
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IMG_0513.jpg335 viewsScotty's carMartinMay 21, 2016
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IMG_0512.jpg347 viewsMark beside his carMartinMay 21, 2016
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IMG_0511.jpg333 viewsHang this in the ceiling and Mark will be out of business :PMartinMay 21, 2016