martinsastro

Astronomy for all.
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misc


Lester.jpg

1 files, last one added on Dec 26, 2011
Album viewed 327 times

Dargo to Licola


IMG_0518.jpg

18 files, last one added on May 21, 2016
Album viewed 153 times

Camper trailer files.



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etacrop.jpg
etacrop.jpgEta Carinae nebula.610 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
M48-done2M.jpg
M48-done2M.jpgM48.599 viewsMessier 48 (also known as M 48 or NGC 2548) is an open cluster in the Hydra constellation. It was discovered by Charles Messier in 1771.

There is actually no cluster in the position indicated by Messier. The value that he gave for the right ascension matches that of NGC 2548, however, his declination is off by five degrees.Credit for discovery is sometimes given instead to Caroline Herschel in 1783.
Martin
horsephotobucket.jpg
horsephotobucket.jpgHorsehead nebula.743 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
Nick.jpg
Nick.jpg483 viewsSrike the pose Niko.Martin
NGC253done2Meg.jpg
NGC253done2Meg.jpgNGC253533 viewsG11 guiding test on 24-08-2011 with latest August firmware.
10x200Sec RGB and 25x300Sec L on a ED80 and QHY9.
Uncropped.
Martin
Dave_and_scope.jpg
Dave_and_scope.jpg581 viewsMartin
1123_and_1124.jpg
1123_and_1124.jpgAr1123 and 1124.576 viewsMartin
Patrick_and_Chris.jpg
Patrick_and_Chris.jpg558 viewsMartin

Last additions
IMG_0518.jpg
IMG_0518.jpgnice view611 viewsnice viewMartinMay 21, 2016
IMG_0517.jpg
IMG_0517.jpgARB Kev681 viewsARB Kev.MartinMay 21, 2016
IMG_0516.jpg
IMG_0516.jpg333 viewsKev's CarMartinMay 21, 2016
IMG_0515.jpg
IMG_0515.jpg338 viewsJacki and carMartinMay 21, 2016
IMG_0514.jpg
IMG_0514.jpg339 viewsAlex's carMartinMay 21, 2016
IMG_0513.jpg
IMG_0513.jpg340 viewsScotty's carMartinMay 21, 2016
IMG_0512.jpg
IMG_0512.jpg350 viewsMark beside his carMartinMay 21, 2016
IMG_0511.jpg
IMG_0511.jpg337 viewsHang this in the ceiling and Mark will be out of business :PMartinMay 21, 2016