An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Jupiter's Great Red Spot storm, which usually appears dark-red, can be seen shining a lurid blue color in an ultraviolet ...

"There are still many things related to planetary formation and the early evolution of young planetary systems that we don't ...

NASA's mission to send a spacecraft to scour Jupiter's moon Europa for signs of life appears back on track after Hurricane ...

Venus, Saturn, Jupiter and Mars will appear to line up and be bright enough to see with the naked eye in the first few hours ...

The six planets will be visible in the days immediately leading up to Jan. 21, and for about four weeks afterward. Mars, ...

Smaller gas giants are less likely to survive in such systems, surrounded by clashing planetary titans. With their lower ...

NASA, ESA, and M. Wong (University of California - Berkeley); Processing: Gladys Kober (NASA/Catholic University of America) ...

Video shows the preparation behind a SpaceX Falcon Heavy rocket launch at The Kennedy Space Center's Launch Complex 39A in ...

A rare parade of planets will light up the night sky throughout January. Six planets will be in alignment for the rest of the ...

NASA and famed astronaut Buzz Aldrin say stargazers have the best chance of catching a glimpse of Saturn and Venus in ...

Galileo Galilei's telescopic discovery of Jupiter's four moons in 1610 revolutionized astronomy and supported heliocentric ...