Google has expanded the boundaries of Google Earth to include views of the universe with a new add-on called Sky. The tool, found in Google Earth 4.2, offers high-resolution photographs from the Hubble Space Telescope and educational information about stellar discoveries and constellations.
Getting to Google Sky was a little confusing, but it's actually an icon right in the middle of the page (circled). The first screen shows constellations to make it easier to find what you're looking for. With your mouse you can rotate 360 degrees around the sky and can also zoom in and out with your scroll wheel.