... Compare these two close-up pictures taken on sol 20 (left) and sol 24 of a trench dug in the Martian surface by NASA's Phoenix Lander. ... The Star Streams of NGC 5907 . ... Grand tidal streams of stars seem to surround galaxy NGC 5907. The arcing structures form tenuous loops extending more than 150,000 light-years from the narrow, edge-on spiral, also known as the Splinter or Knife Edge Galaxy. ... APOD: 2008 June 17- Eta Carinae and the Homunculus Nebula . ... No one knows for sure. ...