Hubble images a complex galactic trio

Hubble images a complex galactic trio

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Hubble images a complex galactic trio
Credit: ESA/Hubble & NASA, W. Keel

This luminescent image features multiple galaxies, perhaps most noticeably LEDA 58109, the lone galaxy in the upper right. LEDA 58109 is flanked by two further galactic objects to its lower left—a galaxy with an active galactic nucleus (AGN) called SDSS J162558.14+435746.4 that partially obscures the galaxy SDSS J162557.25+435743.5, which appears to poke out to the right behind the AGN.

Galaxy classification is sometimes presented as something of a dichotomy: spiral and elliptical. However, the diversity of in this image alone highlights the complex web of galaxy classifications that exist, including that house extremely luminous AGNs at their cores, and galaxies whose shapes defy the classification of either spiral or elliptical.

The sample of galaxies here also illustrates the wide variety of names that galaxies have: some relatively short, like LEDA 58109, and some very long and challenging to remember, such as the two galaxies to the left. This is due to the variety of cataloging systems that chart the in the night sky. No one catalog is exhaustive, and they cover overlapping regions of the sky so that many galaxies belong to several different catalogs. For example, the galaxy on the right is LEDA 58109 in the LEDA galaxy database, but is also known as MCG+07-34-030 in the MCG galaxy catalog and SDSS J162551.50+435747.5 in the SDSS galaxy catalog—the same catalog that also lists the two galaxies to the left.



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Hubble images a complex galactic trio (2022, July 30)
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