TO FULLY CHARACTERIZE EXO-EARTHS (EARTH MASS ~1 YEAR ORBIT) RADIAL VELOCITY (RV) MEASUREMENTS ARE REQUIRED. HOWEVER THE ACCURACY OF RV MEASUREMENTS SEEMS STUCK AT ~1 M/S >> THE 20 CM/S NEEDED FOR SUCCESS. MOST OF THE BLAME LIES WITH STELLAR
$500,616FY2021National Aeronautics and Space AdministrationNASA
Smithsonian Institution, Washington DC