gingadan.com

IC 2574 (Coddington's Nebula)


Home > Galaxy > IC2574
Down
Movie

IC 2574
Coddington's Nebula (コーディントンの星雲)
Dwarf Galaxy (矮小銀河)
Gx SBm


別名 (Other names)
PGC 30819, UGC 5666, MCG 12-10-38

明るさ (Brightness)
10.2等級

星座 (Constellation)
おおぐま座 (UMa) (Ursa Major)


距離 (Distance)
1,200万光年 (12 million light-years)

IC 2574 (Coddington's Nebula) is a dwarf galaxy located 12 million light years from the Earth in the constellation Ursa Major.

IC 2574 (Coddington's Nebula) : Picture

IC 2574 (Coddington's Nebula)
IC 2574: Coddington's Nebula
(C) Stephen Leshin
Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in beautiful, symmetric spiral arms. But small, irregular galaxies form stars too. In fact dwarf galaxy IC 2574 shows clear evidence of intense star forming activity in its telltale pinkish regions of glowing hydrogen gas. Just as in spiral galaxies, the turbulent star-forming regions in IC 2574 are churned by stellar winds and supernova explosions spewing material into the galaxy's interstellar medium and triggering further star formation. A mere 12 million light-years distant, IC 2574 is part of the M81 group of galaxies, seen toward the northern constellation Ursa Major. Also known as Coddington's Nebula, the lovely island universe is about 50,000 light-years across, discovered by American astronomer Edwin Coddington in 1898.

IC 2574 (Coddington's Nebula)
IC 2574 (Coddington's Nebula)
(C) NASA/ESA/Hubble
The NASA/ESA Hubble Space Telescope has imaged a region of space containing the intriguing object IC 2574. Pink bubbles blown by supernova explosions abound in this faint galaxy. The colour of these shells comes from hydrogen gas irradiated by newborn stars. The formation of the stars was triggered by shock waves from earlier supernova detonations that compressed material together.

IC 2574 is commonly known as Coddington's Nebula after the American astronomer Edwin Coddington, who discovered it in 1898. Astronomers classify IC 2574 as a dwarf irregular galaxy due to its relatively small size and lack of organisation or structure. These galaxies are thought to resemble some of the earliest that formed in the Universe. Dwarf irregular galaxies thus serve as useful "living fossils" for studying the evolution of more complex galaxy types such as our home, the Milky Way, with its central bar and spiral arms. The expanding shells in IC 2574 are of particular interest to astronomers as they reveal how supernova-driven explosions ignite round after round of star formation.  

The constellation containing IC 2574 is Ursa Major. IC 2574 is located about 12 million light-years away, belonging to the Messier 81 group of galaxies. This group is named after the most prominent galaxy in its midst, the big, bright and accordingly well-studied spiral galaxy Messier 81.

IC 2574 (Coddington's Nebula)
IC 2574 (Coddington's Nebula)
(C) NASA/ESA/Hubble

IC 2574 IC 2574
IC 2574: Coddington's Nebula
(C) Stephen Leshin
IC 2574 (Coddington's Nebula)
(C) NASA/ESA/Hubble
Up
Up

IC 2574 (Coddington's Nebula) : Movie

Up
Home > Galaxy > IC2574
Up

gingadan.com ブログパーツ