In addition to knowing everything about you Google now has the Earth, the Sky, the Moon and Mars - in map form. Like Google Maps, Google Sky gives you an interactive mosaic of the visible universe. The images come from various sources, details can be found on their about page.
The buttons on the upper right give you the option to see infrared and microwave views, as well as overlaying a "historical" map from 1792 drawn by Giovanni Maria Cassini. The view below covers the same area as the one above.
You can zoom, pan and click on things as well as selecting views, galaxies, planets and constellations from a gallery at the bottom of the page. Here is a view of the Crab Nebula.
In addition to the sky, you can also Google Moon and Google Mars.
Here is a view of the moon with imagery, charts and Apollo Landings overlaid.
Here is what the topographic chart option looks like.
Finally, here is an elevation image from Google Mars.
1 year ago