The virtual telescope brings together images from a number of sky-mapping organisations, including the Hubble space telescope and the UK Astronomy Technology Centre.
To start exploring today, download the newest version of Google Earth, click on the new Sky button on the toolbar at the top of the screen, and navigate the skies! There are 100 million individual stars and 200 million galaxies in Sky just waiting to be discovered. To help you get started, we've prepared a short video.
Users can view and navigate through 100 million individual stars and 200 million galaxies.
There are also special sections on constellations, backyard astronomy, Hubble imagery, the Moon, the planets, galaxies and the life of a star.
Dr Carol Christian, of the Space Telescope Science Institute which provided images for the project, said: "Never before has a roadmap of the entire sky been made so readily available.
"Anyone interested in exploring the wonders of our universe can quickly see where the stunning objects photographed by Hubble actually dwell in the heavens."
Lior Ron, product manager at Google, said: "We're excited to provide users with rich astronomical imagery and enhanced content that enables them to both learn about what they're seeing and tell their own stories.
"By working with some of the industry's leading experts, we've been able to transform Google Earth into a virtual telescope."