Humanity is about to get its first in person, up close look at the Moon in more than half a century. Four astronauts will spend about seven hours on Monday April 6 observing the far side of the Moon, the half that constantly points away from Earth. At their closest approach on board their Orion spacecraft Integrity , Reid Wiseman, Victor Glover, and Christina Koch of NASA and Jeremy Hansen with the Canadian Space Agency will be about 4,000 miles 6,400 km above the surface. The last time any...