martinsastro

Astronomy for all.
Home > User galleries

There are no user galleries
Random files - User galleries
rosettecropfinal.jpg
rosettecropfinal.jpgRosette nebula.499 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
Jen6.jpg
Jen6.jpg432 viewsMartin
Omega-test.jpg
Omega-test.jpgOmega Centauri.652 viewsOmega Centauri (ω Cen) or NGC 5139 is a globular cluster[7] seen in the constellation of Centaurus, discovered by Edmond Halley in 1677 who listed it as a nebula. Omega Centauri had been listed in Ptolemy's catalog 2000 years ago as a star. Lacaille included it in his catalog as number I.5. It was first recognized as a globular cluster by the English astronomer John William Herschel in the 1830s.[8] Orbiting the Milky Way, it is both the brightest and the largest known globular cluster associated with our galaxy (1.6 Em). Of all the globular clusters in the Local Group of galaxies, only Mayall II in the Andromeda Galaxy is brighter and more massive.[9] ω Centauri is so different from other galactic globular clusters, that it is thought to be of different origin.[10]

Omega Centauri is located about 15,800 light-years (4,850 pc) from Earth and contains several million Population II stars. The stars in its center are so crowded that they are estimated to average only 0.1 light years away from each other. It is about 12 billion years old
Martin
Jen7.jpg
Jen7.jpg428 viewsMartin
Morning.jpg
Morning.jpg434 viewsMartin
Jen3.jpg
Jen3.jpg551 viewsMartin
Relaxed_Dazza.jpg
Relaxed_Dazza.jpg425 viewsMartin
Daniel.jpg
Daniel.jpg424 viewsMartin

Last additions - User galleries
rosette_done_ha2Mb.jpg
rosette_done_ha2Mb.jpgRosetta in HA.501 viewsStill lots of noise in the surroundings so will need more exposures.MartinDec 28, 2014
Eta_Carinae_done_ha2Mb.jpg
Eta_Carinae_done_ha2Mb.jpgEta Carinae with the EQ8 mount.811 viewsMartinDec 28, 2014
Eta_Carina.jpg
Eta_Carina.jpgEta Carinae533 viewstest image with OAG.MartinFeb 12, 2014
Lagoondone2Mb.jpg
Lagoondone2Mb.jpgLagoon nebula669 viewsDone with the ED100 and Hutech FR/FF.MartinMay 15, 2013
triffid_done2MB.jpg
triffid_done2MB.jpgTriffid nebula736 viewsDone with the ED100 and Hutech FR/FF.MartinMay 15, 2013
testing.jpg
testing.jpgtestimage971 views2X30Seconds at ISO1600MartinMay 12, 2012
Sombrerocropdone.jpg
Sombrerocropdone.jpgSombrero galaxy1546 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.MartinMay 11, 2012
NGC4945.jpg
NGC4945.jpgNGC4945.1070 viewsNGC4945 with the Supernova.MartinApr 11, 2012