SBS 1415+437

SBS 1415+437, also known as PGC 51017, is a blue compact dwarf galaxy and Wolf-Rayet galaxy located in the constellation Boötes approximately 45.3 million light-years away from the Milky Way. It was discovered in 1995 by a team of astronomers from the University of Virginia coordinated by Trinh Thuan.
It was initially thought that the galaxy hosted only very young stars, but the stars were later found to be up to 1.3 billion years old.
SBS 1415+437 is also a starburst galaxy of the rare Wolf-Rayet type, as it contains an unusually large number of Wolf-Rayet stars. These are massive stars, short-lived, with surface temperatures of over 25,000 kelvin which, due to very strong stellar winds, lose large quantities of their mass. It is said the galaxy hosted a number of Red-giant branch stars apart from Wolf-Rayets as well.
In 2019, astronomers found there are traces of ionized gas inside the star-forming regions of SBS 1415+437, hinting the presence of elemental abundances of chemical elements such as nitrogen, argon and sulfur.