ESA 's next mission , BepiColombo , will explore the planet closest to the Sun , Mercury . Comment: It will endure temperatures of 350 degrees Celsius and observe Mercury from orbit . Read more from Make , Create , Innovate : . The data will be used , among other things , to confirm Einstein 's theory of relativity .
ESA 's next mission , BepiColombo , will explore the planet closest to the Sun , Mercury . Comment: It will endure temperatures of 350 degrees Celsius and observe Mercury from orbit . The data will be used , among other things , to confirm Einstein 's theory of relativity .