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Arp 240 (Interacting Galaxy)


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Arp 240 (NGC 5257 and NGC 5258)
Interacting Galaxy (相互作用銀河)

別名 (Other names)
NGC 5257/8, VV 055, KPG 389
(NGC 5257: PGC 48330, UGC 8641)
(NGC 5258: PGC 48338, UGC 8645, MCG 0-35-16)

明るさ (Brightness)
12.1等級

星座 (Constellation)
おとめ座 (Vir) (Virgo)


距離 (Distance)
3億光年 (300 million light-years)

Arp 240 (NGC 5257 and NGC 5258) is an interacting galaxy located 300 million light years from the Earth in the constellation Virgo.

Arp 240 (NGC 5257 and NGC 5258) : Picture

Hubble Interacting Galaxy NGC 5257
Hubble Interacting Galaxy NGC 5257
(C) NASA, ESA
NGC 5257/8 (Arp 240) is an astonishing galaxy pair, composed of spiral galaxies of similar mass and size, NGC 5257 and NGC 5258. The galaxies are visibly interacting with each other via a bridge of dim stars connecting the two galaxies, almost like two dancers holding hands while performing a pirouette. Both galaxies harbor supermassive black holes in their centers and are actively forming new stars in their disks. Arp 240 is located in the constellation Virgo, approximately 300 million light-years away, and is the 240th galaxy in Arp's Atlas of Peculiar Galaxies. With the exception of a few foreground stars from our own Milky Way all the objects in this image are galaxies.

Hubble Interacting Galaxy NGC 5257
Hubble Interacting Galaxy NGC 5257
(C) NASA, ESA
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Arp 240 (NGC 5257 and NGC 5258) : Movie

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