NASA says NGC 6872 is the largest spiral galaxy ever discovered

Located about 212 million light-years from Earth, the massive spiral galaxy NGC 6872 has been known to astronomers for decades. But it wasn't until a recent survey of nearby star-forming regions that NASA scientists realized just how big it truly is. New data shows that, from tip-to-tip across its two outsized spiral… » 1/11/13 7:20am 1/11/13 7:20am