Is not this a beautiful and dynamic image? NASA and ESA released it on May 16, 2019. This is an irregular galaxy called NGC 4485, viewed by the Hubble Space Telescope. HubbleSite has declared this galaxy:
… shows all the signs of being involved in an accident with a bypass galaxy. Rather than destroying the galaxy, the chance encounter engenders a new generation of stars and presumably planets.
The right side of the galaxy is in flames with star formation, illustrated by the plethora of young blue stars and pinkish nebulae incubating. The left side, however, seems intact. It contains allusions to the anterior spiral structure of the galaxy, which at one point experienced a normal galactic evolution.
The largest culprit galaxy, NGC 4490, is at the bottom of the frame. The two galaxies came together millions of years ago and are now 24,000 light years apart. The gravitational standoff between them created undulating plates of gas and dust of higher density in both galaxies. This activity sparked a wave of star training.
This galaxy is a close example of the kind of activity of cosmic bumper cars that was most common billions of years ago when the Universe was smaller and the galaxies closer to each other.
NGC 4485 is located 25 million light-years away from the northern constellation, Canes Venatici (hunting dogs).
Conclusion: image of the Hubble Space Telescope of galaxy NGC 4490, which has been swept in the opposite direction by another galaxy and is currently undergoing rampant star formation … but only on one side.