Astrophysicists have observed our central supermassive black hole. They found the accretion disk is constantly emitting flares without periods of rest. Shorter, faint flares and longer, bright flares ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

Last year, astronomers discovered an unusual Earth-size exoplanet they believe has a hemisphere of molten lava, with its ...

This Valentine's Day, stargazers in some parts of the United States will have the opportunity to experience the surreal views ...

Valentine's Day could bring a dazzling display of the northern lights for stargazers in some parts of the U.S.