You don’t need to be a billionaire to take a trip through space anymore. With Google Sky (Google Earth v4.2), you can do just that. You’ll be amazed to know that exploration of star constellations, viewing planetary motions or supernova explosions is just a mouse-click away with this new release of Google Earth.
stitched together from more than one million photographs from scientific and academic sources, including the Sloan Digital Sky Survey, the Palomar Observatory at the California Institute of Technology and the NASA-financed Hubble.
Another new introduction (though pretty limited in scope as of now) is the ultra-high resolution imagery of select places accessible through Primary Database > Featured Content > Gigapxl Photos.