 Here we see two interacting galaxies, collectively called ARP 143. Astronomers suggest that the galaxies pass through each other, igniting the uniquely shaped star formation in NGC 2445, where there are thousands of new stars. Galaxy NGC 2444 is pulling gas from 2445. This is forming the unusual triangle shape. Stars no older than 1 million to 2 million years are forming closer to the center of 2445. Hubble reveals some individual stars. They are the brightest and most massive in the galaxy. Most of the brilliant blue clumps are groupings of stars. The pink blobs are giant, young star clusters, still enshrouded in dust and gas.