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| 132 files in 12 albums and 1 categories with 0 comments viewed 87,952 times |
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Lagoon.jpgLagoon nebula.851 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
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IMG_0514.jpg407 viewsAlex's carMartin
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Eta_Carinae_done_ha2Mb.jpgEta Carinae with the EQ8 mount.955 viewsMartin
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rosettecropfinal.jpgRosette nebula.613 viewsThe cluster and nebula lie at a distance of some 5,200 light years from Earth (although estimates of the distance vary considerably) and measure roughly 130 light years in diameter. The radiation from the young stars excite the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.
It is believed that stellar winds from a group of O and B stars are exerting pressure on interstellar clouds to cause compression, followed by star formation in the nebula. This star formation is currently still ongoing.
A survey of the nebula with the Chandra X-ray Observatory in 2001 has revealed the presence of very hot, young stars at the core of the Rosette Nebula. These stars have heated the surrounding gas to a temperature in the order of 6 million kelvins causing them to emit copious amounts of X-rays.Martin
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47Tucdone2G.jpg47Tucanae602 views47 Tucanae (NGC 104) or just 47 Tuc is a globular cluster located in the constellation Tucana. It is about 16,700 light years away from Earth, and 120 light years across. It can be seen with the naked eye, with a visual magnitude of 4.0. It's number comes not from the Flamsteed catalogue, but the more obscure 1801 "Allgemeine Beschreibung und Nachweisung der Gestirne nebst Verzeichniss" compiled by Johann Elert Bode.
47 Tucanae was discovered by Nicolas Louis de Lacaille in 1751, its southern location having hidden it from European observers until then. The cluster appears roughly the size of the full moon in the sky under ideal conditions.
It is the second brightest globular cluster in the sky (after Omega Centauri), and is noted for having a very bright and dense core. It has 23 known millisecond pulsars, and at least 21 blue stragglers near the core.Martin
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Eagle_done-1.jpgEagle nebula.628 viewsThe Eagle Nebula is part of a diffuse emission nebula, or H II region, which is catalogued as IC 4703. This region of active current star formation is about 6,500 light-years distant. The tower of gas that can be seen coming off the nebula is approximately 57 trillion miles (97 trillion km) high.
The brightest star in the nebula has an apparent magnitude of +8.24, easily visible with good binoculars.Martin
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IMG_0513.jpg407 viewsScotty's carMartin
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IMG_0518.jpgnice view755 viewsnice viewMartinMay 21, 2016
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IMG_0517.jpgARB Kev831 viewsARB Kev.MartinMay 21, 2016
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IMG_0516.jpg397 viewsKev's CarMartinMay 21, 2016
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IMG_0515.jpg404 viewsJacki and carMartinMay 21, 2016
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IMG_0514.jpg407 viewsAlex's carMartinMay 21, 2016
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IMG_0513.jpg407 viewsScotty's carMartinMay 21, 2016
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IMG_0512.jpg412 viewsMark beside his carMartinMay 21, 2016
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IMG_0511.jpg403 viewsHang this in the ceiling and Mark will be out of business :PMartinMay 21, 2016
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