(via TAKING A NARROW VIEW OF A LOPSIDED GALAXY | Gemini Observatory)
A lopsided starburst galaxy floats in the middle of nowhere. There’s no obvious source for the the gravitational ripples that are prompting the star formation, since there aren’t any nearby galaxies, and it would require a whole lot of supernovae, all at once, to have it be a result of internal forces…maybe it was a slow collision with a galaxy that used to be there, and the whole thing has already “settled” into the larger pattern, with gravity ripples still showing?
In any case, NGC 1313 is interesting, and this is a shot in multiple-wavelengths combined from the Gemini South NOAO observatory in Chile.
From the linked page:
The starburst galaxy NGC 1313, as imaged by the Gemini South 8-meter telescope in Chile using narrow-band filters in the Gemini Multi-Object Spectrograph. The image is comprised of three color layers: red (ionized hydrogen at 656.3 nanometers), green (ionized oxygen at 500.7 nanometers), and blue (ionized helium at 468.6 nanometers). The field-of-view is about 5.5 x 8.2 arcminutes; each filter was integrated for a total of 600 seconds, and the seeing was about 0.5 arcsecond. The image is rotated counter-clockwise 59 degrees from north up and east left and was produced by Travis Rector, University of Alaska, Anchorage.