“The light from the next closest star, called Proxima Centauri, shows us how it looked just over four years ago. The light from a galaxy that lies 65 million light-years away left that galaxy when the dinosaurs were facing extinction.… — Carolyn Collins Petersen Copy Share Image
“The light from the next closest star, called Proxima Centauri, shows us how it looked just over four years ago. The light from a… — Carolyn Collins Petersen Copy Share Image
