These Twin Orbiters Map the Ebb and Flow of Lunar Gravity Down to the Micron

Science has long known about the curious gravitational variations of the moon's surface—called mascons—as evidenced by the Doppler shift of radio signals from passing spacecraft. However, researchers are now taking an unprecedented, high-fidelity look at the moon's gravitational field thanks to a pair of washing… »12/12/12 11:30am12/12/12 11:30am