MESSENGER's Venus 2 flyby will occur while ESA's Venus Express mission continues to orbit around Venus. The complementary viewing geometries and instrument sets of the two spacecraft permit unprecedented two-platform observations of Venus' atmosphere, clouds, and interplanetary environment. Closely coordinated observations of atmospheric dynamics, cloud structure, and atmospheric chemistry are planned. Two-point measurements of the penetration of the interplanetary magnetic field into the Venus ionosphere, plasma boundaries, and tail will be made. Credit: Sean Solomon. The Carnegie Institution of Washington
