Last Updated: Wednesday, November 27, 2013, 15:07
NASA`s STEREO-A spacecraft has captured the best footage yet of Comet ISON hurtling towards the Sun for a close encounter on Thanksgiving.
Last Updated: Friday, January 20, 2012, 19:33
Scientists have debunked a mysterious triangular “UFO” footage captured by a NASA telescope, which found its way to YouTube.
more videos >>