2040 before we finally land. why is that? it depends on where - 2040 before we finally land. why is that? it depends on where you i that? it depends on where you are auoin back that? it depends on where you are going backfor— that? it depends on where you are going back for mercury _ that? it depends on where you are going back for mercury there i that? it depends on where you are going back for mercury there are l going back for mercury there are lots of uncertainties to do with the surface, what it is made of, how it has changed since it formed, but we need to know where we want to land. if you send a lander, if you think about it, you will have to be able to find out the pressure wherever you end up. we need to go a lot about the surface before you pick the landing site, so our mission will orbit the planet for a year, taking a lot of data to help us up really understand a lot more about the surface. the other thing about this mission which makes it special is that there are two spacecraft going to mercury, notjust one. and that means that we can have one spacecraft close to the planet looking at the surface features and understanding the geology, what's happened in its and one further away looking at the magnetic field, the interaction with the sun. so we can do both things at once which is unusual. , ., ., �* , ., ., unusual. given how long bepicolombo is travellin: unusual. given how long bepicolombo is travelling for, _ unusual. given how long bepicolombo is travelling for, how _ unusual. given how long bepicolombo is travelling for, how is _ unusual. given how long bepicolombo is travelling for, how is it _ is travelling for, how is it