2MASS J22132050−5137385
2MASS J22132050−5137385 is a contender for the oldest star in the known universe, with an approximated age of billion years. It is located within the Milky Way galaxy, between 6,230 and 6,820 light years away from Earth in the constellation of Grus. It has a mass that of the Sun. Due to its age, it is likely among the first stars from reionization, ending the Dark Ages about 370,000 years after the Big Bang.