Using the Hubble Space Telescope, scientists observed an actively interacting pair of galaxies. NASA reports this on its blog.
The interacting duo of galaxies is collectively named Arp 143. The pair contains the bright, distorted, star-forming spiral galaxy NGC 2445 on the right and its less luminous companion NGC 2444 on the left.
Astronomers suggest that the galaxies passed through each other, which led to active star formation in NGC 2445, which gave it an unusual triangular shape. As reported in a NASA blog post, the galaxy failed to escape NGC 2444’s “gravitational grip”. In the end, the two galaxies are in a “tug of war” and NGC 2444 appears to be winning. The galaxy has already sucked gas out of NGC 2445, forming a strange triangle of newly born stars.
“This duo of galaxies is ideal for studying star formation and galaxy interactions,” said Elena Sabbi of the Hubble Space Telescope Science Institute in Baltimore, Maryland, USA.