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ESO 306-17 (Elliptical Galaxy)


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ESO 306-17
Elliptical Galaxy (楕円銀河)
Gx E

別名 (Other names)
LEDA 17570, AM 0538-405, MCG -7-12-9

明るさ (Brightness)
13.3等級

星座 (Constellation)
はと座 (Col) (Columba)


距離 (Distance)
5億光年 (500 million light-years)

ESO 306-17 is an elliptical galaxy located 500 million light years from the Earth in the constellation Columba.

ESO 306-17 (Elliptical Galaxy) : Picture

ESO 306-17 (Elliptical Galaxy)
ESO 306-17 (Elliptical Galaxy)
(C) NASA, ESA and Michael West (ESO)
This image from the Advanced Camera for Surveys aboard the NASA/ESA Hubble Space Telescope highlights the large and bright elliptical galaxy called ESO 306-17 in the southern sky.

In this image, it appears that ESO 306-17 is surrounded by other galaxies but the bright galaxies at bottom left are thought to be in the foreground, not at the same distance in the sky. In reality, ESO 306-17 lies fairly abandoned in an enormous sea of dark matter and hot gas.

Researchers are also using this image to search for nearby ultra-compact dwarf galaxies. Ultra-compact dwarfs are mini versions of dwarf galaxies that have been left with only their core due to interaction with larger, more powerful galaxies. Most ultra-compact dwarfs discovered to date are located near giant elliptical galaxies in large clusters of galaxies, so it will be interesting to see if researchers find similar objects in fossil groups.

ESO 306-17 (Elliptical Galaxy)
ESO 306-17 (Elliptical Galaxy)
(C) NASA, ESA and Michael West (ESO)
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ESO 306-17 (Elliptical Galaxy) : Movie

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