To avoid star trails , his camera was mounted on a barndoor-style tracker to compensate for the Earth's rotation . The Pleiades and Hyades , the closest open or galactic star clusters to the Sun, should be recognizable to beginning stargazers . Of course gas giant Jupiter rules as the brightest object in the picture and the largest planet in the Solar System, but second largest planet Saturn is also visible nearby. For sheer size cool red giant star Aldebaran is more impressive though, spanning about forty times the diameter of the Sun. Sixty light-years away and yellowish in this picture, Aldebaran is known as Alpha Tauri, the brightest star in Taurus , the Bull.
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