The comet should be visible by telescope through September, before it gets too close to the sun, and reappear in December on ...

NASA has discovered a new interstellar comet that's currently located about 420 million miles away from Earth. The space ...

NASA's newest astrophysics space telescope launched in March on a mission to create an all-sky map of the universe. Now ...

Arizona is an ideal spot to see the Milky Way thanks to its numerous dark-sky places. Here's the best time to see - and ...