Google added a feature a couple of months ago called Sky - which lets users roam the heavens from its Google Earth application. Effectively turning Google Earth on its head, users are given a view of the sky as seen from Earth where they can view and navigate 100 million individual stars and 200 million galaxies. Users can also use the virtual telescope to see the seven official planets in our solar system, animations of the Moon and add a constellations layer to see how the stars join up.
In Pictures: The Most Spectacular Sights in Google Sky - More Amazing Images Comet, cosmic debris, nebula, galaxy and stellar outburst - they're all here...
Ed - the comet BTW, is Comet C/2001 RX14 (LINEAR) near to galaxy NGC 3726 that was probably captured on Dec. 14th 2002. Comet C/2001 RX14 (LINEAR) passed perihelion on 19th January 2003. The Comet was discovered in 10th September 2001 by the LINEAR program.
GEboards is the first fully-functional message board that exists entirely within Google Earth. Talk about any location, store, restaurant, event or cool quirk in Google Earth. But, it can also be used in Sky mode...
Planisphere for Google Sky Overlay the night sky in Google Earth with your horizon and peaks, an azimuth-altitude grid, and the positions of the Sun, Moon and planets (and Pluto too). Requires the Google Sky functionality in beta 4.2 or later of Google Earth
Earth and sky - we live where they converge. Exploring and understanding both is vitally important to our future. And thanks to the Internet, it can be easy and enjoyable. A newly revised and released Internet feature called Google Earth provides virtual tours and explorations of not just our planet Earth but the sky as well.