According to this link we already have satellites at Earth's L1 and L2 points (!): http://map.gsfc.nasa.gov/mission/observatory_l2.html http://map.gsfc.nasa.go

According to this link we already have satellites at Earth's L1 and L2 points (!): http://map.gsfc.nasa.gov/mission/observatory_l2.html http://map.gsfc.nasa.gov/mission/observatory_l2.html