Found in the constellation Canes Venatici
Discovered by William Herschel in 1787.
NGC 4631 is a huge edge-on spiral galaxy, which is apparently distorted by its small elliptical companion, NGC 4627. Rich field telescopes show it in one field with its large, heavily distorted companion, NGC 4656; this galaxy seems to have interacted massively with NGC 4631: there's a bridge of hydrogen gas connecting both galaxies.
ST-10XME and CFW8a, Astrodon 6nm H-Alpha filter
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May 20 2009