Actually the image at that link shows the sun-earth L2. The article and mission is concerned with the earth-moon L2. Here's a nice diagram of all earth-moon l

Actually the image at that link shows the sun-earth L2. The article and mission is concerned with the earth-moon L2. Here's a nice diagram of all earth-moon lagranges: http://www.orbitalvector.com/Space%20Structures/Lagrange%20Structures/LAGRANGE%20POINT%20STRUCTURES.htm http://www.orbitalvector.com/Space%20Structures/Lagrange%20S... Here's a pdf describing missions related to earth-moon lagrangians: http://www.nasa.gov/pdf/604657main_4-%20GER%20Stakeholders%20Workshop%20Earth-Moon%20L1_L2%20Bobskill.pdf http://www.nasa.gov/pdf/604657main_4-%20GER%20Stakeholders%2...