NGC 2685 (Polar Ring Galaxy)

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Arp 336 (NGC 2685)
Polar Ring Galaxy (極リング銀河)
Gx SB0-a

別名 (Other names)
PGC 25065, UGC 4666, Arp 336

明るさ (Brightness)

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

距離 (Distance)
4,000万光年 (40 million light-years)


極リング銀河は、NGC 4650AやNGC 660など、100個以上が発見されている。
極リング銀河は、英語ではpolar-ring galaxyという名称で呼ばれている天体。

Arp 336 (NGC 2685) is a polar ring galaxy located 40 million light years from the Earth in the constellation Ursa Major.

NGC 2685 (Polar Ring Galaxy) : Picture

Polar Ring Galaxy NGC 2685
Polar Ring Galaxy NGC 2685
NGC 2685 is a confirmed polar ring galaxy - a rare type of galaxy with stars, gas and dust orbiting in rings perpendicular to the plane of a flat galactic disk. The bizarre configuration could be caused by the chance capture of material from another galaxy by a disk galaxy, with the captured debris strung out in a rotating ring. Still, observed properties of NGC 2685 suggest that the rotating ring structure is remarkably old and stable. In this fascinating view of the peculiar system also known as Arp 336 or the Helix galaxy, the strange, perpendicular rings are easy to trace as they pass in front of the galactic disk, along with other disturbed outer structures. NGC 2685 is about 50,000 light-years across and 40 million light-years away in the constellation Ursa Major.

NGC 2685 (Polar Ring Galaxy) : Movie

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極リング銀河. (2012, October 3). In Wikipedia. ブログパーツ