Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye all February long — with two other planets also detectable for skywatchers ...

Because the Moon is over a quarter the diameter of Earth, the Earth-Moon system is often cited as the pairing in our Solar ...

NASA’s Europa Clipper spacecraft has sent back its first starry image, a significant milestone as it makes its way toward Jupiter’s moon Europa. The image, released by NASA this week, is a mosaic of a ...