A brown dwarf, which is a little more than 100 light years away from the sun, has been discovered by the astronomers with the help of a new citizen-science tool that was released earlier this year to pinpoint new worlds lurking in the outer reaches of our solar system.
Details were recently published in the Astrophysical Journal Letters.
Just six days after the launch of the Backyard Worlds: Planet 9 website in February, four different users alerted the science team to the curious object, whose presence has since been confirmed via an infrared telescope. “I was so proud of our volunteers as I saw the data on this new cold world coming in,” said Jackie Faherty, a senior scientist in the American Museum of Natural History’s Department of Astrophysics and one of Backyard World’s researchers. “It was a feel-good moment for science.”
The Backyard Worlds project lets anyone with a computer and an internet connection flip through images taken by NASA’s Wide Field Infrared Survey Explorer (WISE) spacecraft. If an object is close enough to Earth, it will appear to “jump” when multiple images taken of the same spot in the sky a few years apart are compared.
The goal for Backyard Worlds volunteers — of which there are more than 37,000 — is to flag the moving objects they see in these digital flipbooks for further investigation by the science team. So far, volunteers have classified more than 4 million flipbooks.Days after the Backyard Worlds website debuted on February 15, Bob Fletcher, a science teacher in Tasmania, identified a very faint object moving across the WISE images. It was soon also flagged by three other citizen scientists from Russia, Serbia, and the United States.
After some initial investigation by the research team, which originally called the object “Bob’s dwarf,” Faherty was awarded time on NASA’s Infrared Telescope Facility in Hawaii, where she confirmed that it was a previously unknown brown dwarf just a few hundred degrees warmer than Jupiter.
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