Giant comets may be a threat to Earth: astronomers

Dec 23, 2015

Giant comets may be a threat to Earth: astronomers

Planet Earth could be at higher risk of a space rock impact than widely thought, according to astronomers who suggested Tuesday keeping a closer eye on distant giant comets. Most studies of potential Earth-smashers focus on objects in the asteroid belt roughly between Mars, ...

Newest Pluto pics show day in life of dwarf planet

Nov 21, 2015

Newest Pluto pics show day in life of dwarf planet

NASA’s newest Pluto pictures depict an entire day on the dwarf planet. The space agency released a series of 10 close-ups of the frosty, faraway world Friday, representing one full rotation, or Pluto day. A Pluto day is equivalent to 6.4 Earth days. The ...