Image: NASA/ESA/A. Sarajedini (University...  ...oks like a piece of modern art, but it's actually star trails star . ESA's Hubble website explains:...  ...d point in space, which is referred to as a guide star . It is suspected that in this case, Hub...  ......

We've never really talked 'bout Mi...  ...features a gorgeous animated timelapse of star trails over Monument Valley in Utah, and it marks...