Doin' the Black Hole Shuffle

Astronomers think they've found two supermassive black holes that are dancing around each other. Black hole binaries are extremely rare, but in this case, preliminary findings by NASA's Wide-field Infrared Survey Explorer have been confirmed by telescopes in Australia and Chile. "At first we thought this galaxy's unusual properties seen by WISE might mean it was forming new stars at a furious rate," said WISE project manager Peter Eisenhardt. "But on closer inspection, it looks more like the death spiral of merging giant black holes": http://www.jpl.nasa.gov/news/news.php?release=2013-345&1&utm_source=iContact&utm_medium=email&utm_campaign=NASAJPL&utm_content=releases20131203