The Ring Nebula's distinctive shape makes it a popular illustration for astronomy books. But new observations by NASA's Hubble Space Telescope of the glowing gas shroud around an old, dying, sun-like star reveal a new twist.
Fuente : http://www.eurekalert.org/pub_releases/2013-05/nsf...
Fuente : http://www.eurekalert.org/pub_releases/2013-05/nsf...