We study the statistics of large-separation multiply-imaged quasars lensed by clusters of galaxies.In particular,we examine how the observed brightest cluster g
We discuss the association between the candidate magnetar CXOU J171405.7-381031 and the supernova remnant CTB 37B.The recent detection of the period derivative
Dark energy can be studied by its influence on the expansion of the Universe.We investigate current constraints on early dark energy(EDE) achievable by the comb