Inside Track - Mercury, Closest Planet to the Sun

시즌 1, 에피소드 2: Of the nine planets, Mercury orbits on the inside track - the closest planet to the Sun. Baked and irradiated, Mercury is a cratered little world - a pristine record of the impactors that rained from space during the early Solar System. Mercury is weird. It has double sunrises and a day twice as long as its year.