| | Main About Caltech News & Events Research & Education Join Us | 04/19/2016 17:26:29 JPL News: Lone Planetary-Mass Object Found in Family of Stars Share this: A young, free-floating world sits alone in space in this illustration. The object, called WISEA J114724.10?204021.3, is thought to be an exceptionally low-mass "brown dwarf," which is a star that lacked enough mass to burn nuclear fuel and glow like a star. Credit: NASA/JPL-Caltech In 2011, astronomers announced that our galaxy is likely teeming with free-floating planets. In fact, these lonely worlds, which sit quietly in the darkness of space without any companion planets or even a host sun, might outnumber stars in our Milky Way galaxy. The surprising discovery begged the question: Where did these objects come from? Are they pl
来源(Source From): http://www.caltech.edu/news/jpl-news-lone-planetary-mass-object-found-family-stars-50522