they will take part in what is corby family photo in the morning and they have own meeting in the afternoonfamily photo in the morning. it's the planet closest to the sun — with temperatures as high as four and fifty degrees celsius. that's the challenge european and japanese scientists face as they unveiled a space mission to mercury, due to launch next year. our science correspondent rebecca morelle has more. a mysterious world, mercury is the smallest planet in our solar system, and the closest to the sun. covered in craters, towering cliffs and ancient volcanoes, until now, it has been little explored. a major new mission is set to change that. this is the spacecraft cold becky columbo, called becky columbo, after a famous italian scientist. it has taken nearly a decade to build. it is only when you get up close that you really get a sense of the size of this huge piece of kit. and this is a spacecraft built to withstand extremes. to get to mercury, it has to travel towards the sun, and that means dealing with intense radiation and heat. on the surface of mercury, temperatures can reach