martinsastro

Astronomy for all.
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Dazza_and_my_scope_on_right.jpg
Dazza_and_my_scope_on_right.jpg4763 viewsMartin
47Tucreprocessed2Gig.jpg
47Tucreprocessed2Gig.jpg47Tucanae2226 viewsThis is an reprocess and has an less green back ground, also the starcolors look better to me.Martin
jewelbox.jpg
jewelbox.jpgJewelbox.2152 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
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Sombrerocropdone.jpgSombrero galaxy1534 viewsThe Sombrero Galaxy (also known as M104 or NGC 4594) is an unbarred spiral galaxy in the constellation Virgo located 28 million light years from Earth. It has a bright nucleus, an unusually large central bulge, and a prominent dust lane in its inclined disk. The dark dust lane and the bulge give this galaxy the appearance of a sombrero. Astronomers initially thought that the halo was small and light, indicative of a spiral galaxy. But Spitzer found that halo around the Sombrero Galaxy is larger and more massive than previously thought, indicative of a giant elliptical galaxy. [5] The galaxy has an apparent magnitude of +9.0, making it easily visible with amateur telescopes. The large bulge, the central supermassive black hole, and the dust lane all attract the attention of professional astronomers.Martin
CentAfinal2G.jpg
CentAfinal2G.jpgCentaurus A1065 views10 X 5 Min RGB and 15 X 10 Min Luminance.
Martin
NGC4945.jpg
NGC4945.jpgNGC4945.1060 viewsNGC4945 with the Supernova.Martin
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Group1-L_flattener.jpgwith flattener1051 viewsMartin
testing.jpg
testing.jpgtestimage961 views2X30Seconds at ISO1600Martin
Lagoon-L.jpg
Lagoon-L.jpgNo flattener947 viewsMartin
6067_done.jpg
6067_done.jpgNGC6067.946 viewsNGC 6067 is a bright open cluster deep South in the Constellation of Norma. Because it is located in the same plane of the Milky Way it has a dense star background. A nice target for small telescopes even from urban skies. The cluster contains about 100 stars between 8 magnitude and fainter.Martin
LEO.jpg
LEO.jpgThe Leo trio.897 viewsThis is a composition of 15X600 Seconds Luminance and 10X300 Seconds RGB each.Martin
m42done.jpg
m42done.jpgM42.820 viewsThe Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated south of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years[2][5] and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. Older texts frequently referred to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.

The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features.[6] The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust. Astronomers have directly observed protoplanetary disks, brown dwarfs, intense and turbulent motions of the gas, and the photo-ionizing effects of massive nearby stars in the nebula. There are also supersonic "bullets" of gas piercing the dense hydrogen clouds of the Orion Nebula. Each bullet is ten times the diameter of Pluto's orbit and tipped with iron atoms glowing bright blue. They were probably formed one thousand years ago from an unknown violent event.
Martin
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