Figure 13-42 A Starburst Galaxy NGC 1512, located 30 Mly away in the constellation Horologium, is 70,000 ly across. Inset: A ring of vigorous star formation 2400 light-years wide highlights this ultraviolet, visible-light, and infrared composite image of the core of this galaxy. NGC 1512 may have recently passed close to its companion NGC 1510, thereby stimulating the starburst. Such rings of star formation are common in starburst galaxies.