gingadan.com

NGC 4980 (Spiral Galaxy)


Home > Galaxy > NGC4980
Down
Movie

NGC 4980
Spiral Galaxy (渦巻銀河)
Gx SBa

別名 (Other names)
PGC 45596, MCG -5-31-37, AM 1306-282

明るさ (Brightness)
12.6等級

星座 (Constellation)
うみへび座 (Hya) (Hydra)


距離 (Distance)
8,000万光年 (80 million light-years)

NGC 4980 is a spiral galaxy located 80 million light years from the Earth in the constellation Hydra.

NGC 4980 (Spiral Galaxy) : Picture

NGC 4980
NGC 4980
(C) NASA/ESA
This image from the NASA/ESA Hubble Space Telescope shows NGC 4980, a spiral galaxy in the southern constellation of Hydra. The shape of NGC 4980 appears slightly deformed, something which is often a sign of recent tidal interactions with another galaxy. In this galaxy’s case, however, this appears not to be the case as there are no other galaxies in its immediate vicinity.

The image was produced as part of a research program into the nature of galactic bulges, the bright, dense, elliptical centers of galaxies. Classical bulges are relatively disordered, with stars orbiting the galactic center in all directions. In contrast, in galaxies with so-called pseudobulges, or disc-type bulges, the movement of the spiral arms is preserved right to the center of the galaxy.

Although the spiral structure is relatively subtle in this image, scientists have shown that NGC 4980 has a disc-type bulge, and its rotating spiral structure extends to the very center of the galaxy.

A galaxies' bright arms are the location of new star formation in spiral galaxies, and NGC 4980 is no exception. The galaxy's arms are traced out by blue pockets of extremely hot newborn stars are visible across much of its disc. This sets it apart from the reddish galaxies visible in the background, which are distant elliptical galaxies made up of much older, and hence redder, stars.

NGC 4980
NGC 4980
(C) NASA/ESA
Up
Up

NGC 4980 (Spiral Galaxy) : Movie

Up
Home > Galaxy > NGC4980
Up

gingadan.com ブログパーツ