Look to the eastern sky, and a clear horizon will show you this unusual, grinning planet alignment thanks to the crescent ...

Four of Earth’s neighbors are about to appear in a planetary alignment. Those four planets — Mercury, Venus, Neptune and ...

Astronomers have found thousands of exoplanets — worlds beyond our solar system. Most of them are in single-star systems, like our own solar system. A few dozen orbit binary stars, dancing delicately ...

Astronomers have discovered a planet that orbits at a 90-degree angle around a rare pair of strange stars—a real-life 'twist' ...

Astronomers using ESO’s Very Large Telescope have discovered a truly bizarre planet — one that orbits two stars at a perfect ...

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...