The early Universe鈥檚 Dark Ages, probed by the highly redshifted 21-cm neutral hydrogen signal, is the ideal epoch for a new rigorous test of the standard LCDM cosmological model. The Dark Ages Polarimeter PathfindER (DAPPER), operating in a low lunar orbit above the radio-quiet farside, shall search for divergences from the standard model that will indicate new physics such as heating or cooling produced by dark matter.
DAPPER聽is a part of the聽Network for Exploration and Space Science (NESS), a聽multifaceted, multidisciplinary, and innovative investigation in the space sciences, including the areas of astrophysics and heliophysics that are enabled through human and robotic exploration of the target bodies.聽
