Essentially all cells in an organism's body have the same genetic blueprint, or genome, but the set of genes that are actively expressed at any given time in a cell determines what type of cell it ...

Wide binary stars with separation greater than about 2000 astronomical units are interesting natural laboratories that allow a direct probe of gravity at low acceleration weaker than about 1 nanometer ...

First, the design of deep-space open-loop velocity measurement on the basis of China’s DSN (CDSN) is presented. The process of deep-space open-loop velocity measurement contains six steps. First, ...