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HCG 79 (Seyfert's Sextet)


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HCG 79 (Hickson Compact Group 79)
Seyfert's Sextet (セイファートの六つ子)
GX Sa


別名 (Other names)
Seyfert Sextett, NGC 6027, PGC 56576, UGC 10116

明るさ (Brightness)
13.8等級

星座 (Constellation)
へび座 (Ser) (Serpens)

距離 (Distance)

1億9,000万光年 (190 million light-years)

HCG 79 (Seyfert's Sextet) is an interacting galaxy located 190 million light years from the Earth in the constellation Serpens.

HCG 79 (Seyfert's Sextet) : Picture

Seyfert's Sextet
Seyfert's Sextet
(C) Hubble Legacy Archive, NASA, ESA; Processing: Judy Schmidt
What will survive this battle of the galaxies? Known as Seyfert's Sextet, this intriguing group of galaxies lies in the head portion of the split constellation of Serpens. The sextet actually contains only four interacting galaxies, though. Near the center of this Hubble Space Telescope picture, the small face-on spiral galaxy lies in the distant background and appears only by chance aligned with the main group. Also, the prominent condensation on the upper left is likely not a separate galaxy at all, but a tidal tail of stars flung out by the galaxies' gravitational interactions. About 190 million light-years away, the interacting galaxies are tightly packed into a region around 100,000 light-years across, comparable to the size of our own Milky Way galaxy, making this one of the densest known galaxy groups. Bound by gravity, the close-knit group may coalesce into a single large galaxy over the next few billion years.

HCG 79 (Seyfert's Sextet)
HCG 79 (Seyfert's Sextet)
(C) NASA

Seyfert's Sextet
Seyfert's Sextet, Annotated Image
(C) NASA/ESA, J. English (U. Manitoba), S. Hunsberger, S. Zonak, J. Charlton, S. Gallagher (PSU), and L. Frattare (STScI)
The NASA/ESA Hubble Space Telescope is witnessing a grouping of galaxies engaging in a slow dance of destruction that will last for billions of years. The galaxies are so tightly packed together that gravitational forces are beginning to rip stars from them and distort their shapes. Those same gravitational forces eventually could bring the galaxies together to form one large galaxy.
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HCG 79 (Seyfert's Sextet) : Movie

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