martinsastro

Astronomy for all.
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132 files in 12 albums and 1 categories with 0 comments viewed 84,173 times

misc


Lester.jpg

1 files, last one added on Dec 26, 2011
Album viewed 337 times

Dargo to Licola


IMG_0518.jpg

18 files, last one added on May 21, 2016
Album viewed 163 times

Camper trailer files.



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jewelbox.jpg
jewelbox.jpgJewelbox.2224 viewsThe Jewel Box (also known as NGC 4755, the Kappa Crucis Cluster and Caldwell 94) is an open cluster in the constellation of Crux. As Kappa Crucis, it has a Bayer designation despite the fact that it is a cluster rather than an individual star.

It is one of the finest open clusters discovered by Nicolas Louis de Lacaille when he was in South Africa during 1751–1752. This cluster is one of the youngest known, with an estimated age of only 7.1 million years. It has an apparent magnitude of 4.2, and is located 6,440 light years from Earth and contains around 100 stars.

This famous group of young bright stars was named the Jewel Box from its description by Sir John Herschel as "a casket of variously coloured precious stones," which refers to its appearance in the telescope. The bright orange star Kappa Crucis contrasts strongly against its predominantly blue, hot companions. Kappa Crucis is a very large (hence very luminous) young star in its red supergiant stage, which paradoxically indicates that its life is drawing to a close. The cluster looks like a star to the unaided eye and appears close to the easternmost star of the Southern Cross, (Beta Crucis), so is only visible from southern latitudes.
Martin
testing.jpg
testing.jpgtestimage1047 views2X30Seconds at ISO1600Martin
CentAfinal2G.jpg
CentAfinal2G.jpgCentaurus A1156 views10 X 5 Min RGB and 15 X 10 Min Luminance.
Martin
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IMG_0507.jpg298 viewsLooking down at Italians flat 2Martin
etaha-2.jpg
etaha-2.jpgEta Carinae in HA.659 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
Dazza_and_my_scope_on_right.jpg
Dazza_and_my_scope_on_right.jpg4849 viewsMartin
Shane_and_Shane.jpg
Shane_and_Shane.jpg515 viewsShane and Shane.
Very well reccomended :)
If you can go to an concert then go to Shane's band.
Martin
Big_Dave_and_John.jpg
Big_Dave_and_John.jpg578 viewsMartin

Last additions
IMG_0518.jpg
IMG_0518.jpgnice view647 viewsnice viewMartinMay 21, 2016
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IMG_0517.jpgARB Kev721 viewsARB Kev.MartinMay 21, 2016
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IMG_0516.jpg350 viewsKev's CarMartinMay 21, 2016
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IMG_0515.jpg356 viewsJacki and carMartinMay 21, 2016
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IMG_0514.jpg360 viewsAlex's carMartinMay 21, 2016
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IMG_0513.jpg359 viewsScotty's carMartinMay 21, 2016
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IMG_0512.jpg367 viewsMark beside his carMartinMay 21, 2016
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IMG_0511.jpg357 viewsHang this in the ceiling and Mark will be out of business :PMartinMay 21, 2016