Exoplanets—planets that orbit stars beyond our solar system—have transformed our understanding of the universe. Since the ...

Pluto stands stationary this morning at 2 A.M. EDT against the background stars of Capricornus. Additionally, Saturn experiences its equinox as the Sun crosses the planet's equator. The rings' shadow ...

If Earth had massive rings like Saturn, our sky, weather, tides, and even life could be dramatically different. Scientists explore how stunning—and strange—our world would become under ...