Outer space is the emptiness that exists beyond and between celestial bodies such as stars and planets, including Earth. Though outer space is the closest thing in existence to a perfect vacuum, it is not entirely empty, containing a few hydrogen atoms per cubic meter. Space is also full of radiation, magnetic fields, and—theoretically—dark matter. It is extremely cold. Contrary to popular belief, an unprotected human would neither instantly explode nor freeze in space. What would happen? Discuss