What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the universe, others right here on Earth." ...

Pluto is much smaller than Earth and so the force of gravity on ... Students could then research the relative sizes of the other planets to Earth and use this to work out what each of the objects ...

Small, cold, and absurdly far away, Pluto has always been selfish with ... “But they assumed, nevertheless, that it was probably Earth size. So, much smaller than Uranus and Neptune, but a ...

Neither one is “big.” Earth’s moon is 2,160 miles in diameter. Some scientists believe Pluto should be upheld, but others suggest that Pluto, UB313 and other icy denizens of the Kuiper Belt ...

"Charon is HUGE relative to Pluto, to the point where they are actually a binary," Denton explained. "It's half Pluto's size ...

Pluto is much smaller than Earth and so the force of gravity on ... Students could then research the relative sizes of the other planets to Earth and use this to work out what each of the objects ...