martinsastro

Astronomy for all.
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IMG_0517.jpg
IMG_0517.jpgARB Kev66 viewsARB Kev.Martin55555
(1 votes)
LEO.jpg
LEO.jpgThe Leo trio.566 viewsThis is a composition of 15X600 Seconds Luminance and 10X300 Seconds RGB each.Martin55555
(1 votes)
Centaurus_done.jpg
Centaurus_done.jpgCentaurus A.214 viewsThe Centaurus A/M83 Group is a complex group of galaxies in the constellations Hydra, Centaurus, and Virgo. The group may be roughly divided into two subgroups. The Cen A Subgroup, at a distance of 11.9 Mly (3.66 Mpc), is centered around Centaurus A, a nearby radio galaxy.[3] The M83 Subgroup, at a distance of 14.9 Mly (4.56 Mpc), is centered around the Messier 83 (M83), a face-on spiral galaxy.[3]

This group is sometimes identified as one group[4][5] and sometimes identified as two groups.[6] Hence, some references will refer to two objects named the Centaurus A Group and the M83 Group. However, the galaxies around Centaurus A and the galaxies around M83 are physically close to each other, and both subgroups appear not to be moving relative to each other.[3]

The Centaurus A/M83 Group is part of the Virgo Supercluster, the local supercluster of which the Local Group is an outlying member.
Martin55555
(1 votes)
Jen3.jpg
Jen3.jpg193 viewsMartin44444
(1 votes)
NGC4945.jpg
NGC4945.jpgNGC4945.635 viewsNGC4945 with the Supernova.Martin33333
(2 votes)
Horsehead.jpg
Horsehead.jpgHorsehead.317 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.
Martin33333
(2 votes)
horsephotobucket.jpg
horsephotobucket.jpgHorsehead nebula.294 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.
Martin33333
(1 votes)
CentAfinal2G.jpg
CentAfinal2G.jpgCentaurus A643 views10 X 5 Min RGB and 15 X 10 Min Luminance.
Martin33333
(3 votes)
1123_and_1124.jpg
1123_and_1124.jpgAr1123 and 1124.204 viewsMartin22222
(1 votes)
testing.jpg
testing.jpgtestimage583 views2X30Seconds at ISO1600Martin11111
(1 votes)
Sombrerocropdone.jpg
Sombrerocropdone.jpgSombrero galaxy1106 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.Martin11111
(1 votes)
Eta_2Mb.jpg
Eta_2Mb.jpgEta Carinae.240 viewsFocused on the dimmest star without a Bahtinov mask worked better than with a mask.Martin11111
(1 votes)
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