Astronomers have made a detection suggesting biosignatures, or signs of biological activity, on an exoplanet located 124 ...

While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...

An iconic shot of Ed White during his historic first US spacewalk over New Mexico and southern California, June 3-7, 1965. The following is a transcript of the conversation between astronauts while ...