When you sit at a campfire and look up at the stars, even the tiniest pinpricks of light that you see are massive furnaces, producing intense heat. But hidden among these infernal embers are celestial bodies so dim that they’re invisible to the naked eye. One such star, a brown dwarf smaller than Jupiter, recently became the coldest star ever to be detected with a radio telescope. At a paltry 797 degrees Fahrenheit, it’s cooler than the average campfire: an ideal star for roasting marshmallows. The existence of brown dwarfs was hypothesized 60 years ago, but “they were very hard to find, because they’re not very bright,” Dr. Murphy said.

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Persons: Don’t, graham, Kovi Rose, ”, Tara Murphy, Rose, “, they’re, Dr, Murphy Organizations: University of Sydney