Two stars were once considered coldest known
Excerpt from the September 18, 1965, issue of Science News Letter
![Y dwarf illustration](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/09/091915_50yearsago_dwarfchillin_free.jpg?fit=860%2C460&ssl=1)
JUST CHILLIN’ Some brown dwarfs, such as the “Y dwarf” illustrated here, have temperatures at or below room temperature. Y dwarfs were discovered in 2011.
JPL-Caltech/NASA