RT @cosmos4u: Comet C/2013 X1 (PANSTARRS) passing very close to the Helix Nebula today; flickr.com/photos/fhhemme… – what an extreme color contrast!
RT @cosmos4u: Comet C/2013 X1 (PANSTARRS) passing very close to the Helix Nebula today; flickr.com/photos/fhhemme… – what an extreme color contrast!