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Hubble focuses on the 'Great Attractor'

Date:
January 22, 2013
Source:
NASA
Summary:
A busy patch of space has been captured in an image from the NASA/ESA Hubble Space Telescope. Scattered with many nearby stars, the field also has numerous galaxies in the background.

Located on the border of Triangulum Australe (The Southern Triangle) and Norma (The Carpenter’s Square), this field covers part of the Norma Cluster (Abell 3627) as well as a dense area of our own galaxy, the Milky Way.
Credit: ESA/Hubble & NASA

A busy patch of space has been captured in an image from the NASA/ESA Hubble Space Telescope. Scattered with many nearby stars, the field also has numerous galaxies in the background.

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Located on the border of Triangulum Australe (The Southern Triangle) and Norma (The Carpenter's Square), this field covers part of the Norma Cluster (Abell 3627) as well as a dense area of our own galaxy, the Milky Way.

The Norma Cluster is the closest massive galaxy cluster to the Milky Way, and lies about 220 million light-years away. The enormous mass concentrated here, and the consequent gravitational attraction, mean that this region of space is known to astronomers as the Great Attractor, and it dominates our region of the Universe.

The largest galaxy visible in this image is ESO 137-002, a spiral galaxy seen edge on. In this image from Hubble, we see large regions of dust across the galaxy's bulge. What we do not see here is the tail of glowing X-rays that has been observed extending out of the galaxy -- but which is invisible to an optical telescope like Hubble.

Observing the Great Attractor is difficult at optical wavelengths. The plane of the Milky Way -- responsible for the numerous bright stars in this image -- both outshines (with stars) and obscures (with dust) many of the objects behind it. There are some tricks for seeing through this -- infrared or radio observations, for instance -- but the region behind the center of the Milky Way, where the dust is thickest, remains an almost complete mystery to astronomers.

This image consists of exposures in blue and infrared light taken by Hubble's Advanced Camera for Surveys.


Story Source:

The above story is based on materials provided by NASA. Note: Materials may be edited for content and length.


Cite This Page:

NASA. "Hubble focuses on the 'Great Attractor'." ScienceDaily. ScienceDaily, 22 January 2013. <www.sciencedaily.com/releases/2013/01/130122112439.htm>.
NASA. (2013, January 22). Hubble focuses on the 'Great Attractor'. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2013/01/130122112439.htm
NASA. "Hubble focuses on the 'Great Attractor'." ScienceDaily. www.sciencedaily.com/releases/2013/01/130122112439.htm (accessed December 20, 2014).

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