florida eight years ago, slingshot off venus's gravity twice to land in march of last year. mapping of mercury's entire surface which has never been done and study the magnetic field. scientists believe either meet recordites carrying eyes slamming into the planet or planetary gas on the planet could have put the ice there on mercury in the first place. the way ice could stay on mercury would be on the poles or deep craters or trough where direct sunlight never penetrates. mercury's orbit is so that the planet orbits very slowly only two times in the orbit al year. those regions could create cold traps keeping the ice from melting. this is on a planet so close to the sun, the sun is actually 11 times brighter there than it is for us here. jenna? jenna: wow, imagine that. >> reporter: something to think about. jenna: definitely to think about, thank you.