Astronomers have identified a distant galaxy so faint it barely qualifies as visible. It’s not just the distance part that has researchers squinting to get a better view. Dubbed Candidate Dark Galaxy-2, or CDG-2, the object appears to be composed of at least 99.9 percent dark matter, the invisible substance believed to make up most […] The post NASA Scientists Found a Nearly Invisible ‘Ghost Galaxy’ Made of 99% Dark Matter appeared first on VICE .