LOS ANGELES — A billion miles beyond Pluto, astronomers have discovered a frozen celestial body 800 miles across -- the biggest find in the solar system since the ninth planet was spotted 72 years ago.
LOS ANGELES — A billion miles beyond Pluto, astronomers have discovered a frozen celestial body 800 miles across -- the biggest find in the solar system since the ninth planet was spotted 72 years ago.
洛杉矶消息——天文学家在冥王星以外十亿英里处发现一直径800英里的冰冷的天体。