Planetary geologist Kirby Runyon is lead author of an abstract that proposes a new, geophysical definition of what a planet is. It would grant our solar system 110 planets, including Pluto and the moon. Up, up and away with Digital Editor Jason Davis on World View’s balloon ride to just below the edge of space. It’s the asteroid of love and it’s the destination of this week’s space trivia contest. Bill Nye has the week off.