This pair of galaxies is currently in the process of colliding and merging into one, a process that will take around a ...

will study the sun’s outer atmosphere, the corona, to determine how it transitions into the stream of charged particles known as solar wind. To do this, the satellites will make 3D observations ...

"These are the first high-definition images taken of the sun going down and then going into darkness at the horizon [on the moon]," Joel Kearns, deputy associate administrator for exploration at ...