... Did you know that our Milky Way Galaxy has huge bubbles emitting gamma rays from the direction of the galactic center? ... 700 Kilometers Below Comet Hartley 2 . ... EPOXI was near its closest approach -- about 700 kilometers away -- when it snapped the above picture. ... Like an illustration in a galactic Just So Story, the Elephant's Trunk Nebula winds through the emission nebula and young star cluster complex IC 1396, in the high and far off constellation of Cepheus. ... Comet Hartley 2 Flyby . ...