The Size Of Our World
The Scale of the Universe
Zoom from the edge of the universe to the quantum foam of spacetime!
'100 percent' chance for life on newly found planet?
Gliese 581g may be the new Earth. A team of astronomers from the University of California and the Carnegie Institute of Washington say they've found a planet like ours, 20 light years (120 trillion miles) from Earth, where the basic conditions for l...