Google Sky is a new service launched last week that allows you to virtually tour the Cosmos in 3D and watch constellations, stars, galaxies and more, from any point on Earth. Google Sky was developed (and still in beta!) with some of the world's leading observatories, including NASA, and allows you to zoom and navigate through more than 200 million galaxies and take a detailed tour around 100 million individual solar systems... just like as you would do on Google Map. Sky appears as a new feature/button on Google Earth, Google's virtual geography applications for Mac, Linux and Windows.

At the Search Engine Strategies conference held in San Jose, Google VP, Marissa Mayer (pictured), said that Google is looking to have a large community component around Google Sky just like with Maps that let people edit local businesses listings and make changes to the maps.

"We'll be interested in Google Sky to have people annotate. I think we may make possible in the future for us to start let people uploading particular pictures they have. Right now, there are some interface challenges because we don't have a way of showing multiple versions of the same imagery but overall I do think that we'll see a layer of annotations available", Mayer said.