While scientists don't think it's a comet, they're not exactly sure of the precise origin of the incredible object soaring some 90 million miles from Earth, snapped just a few weeks ago by the Hubble Space Telescope. "I've seen thousands of astronomical images over my career, but this is one of the few absolute jaw-droppers: A flying X-pattern with trailing streamers," said Ray Villard, a contributing writer to Discovery News. "Whatever it is, nothing quite like it has ever before been seen in the heavens." Even the experts who study celestial phenomena seem somewhat perplexed. "We're still trying to really...