Anomalous Stellar Acceleration: Causes And Consequences
G. L. Matloff et al. (2021), JBIS, 74, pp.269-275
As a successor to Hipparcus, an earlier European Space Agency (ESA) space telescope, the ESA Gaia space telescope was launched in December 2013 and is currently on-station at the Earth-Sun L2 Lagrange point, about 1.5 x 106km from Earth. The goal of this mission is accurate determination of position and motions for ~1 billion stars in the Milky Way galaxy .