The delicate balance of the entire Solar System exists in a gravitational dance between planets. Swap the orbits of two of them and you could end up wreaking all kinds of havoc. What would happen to a ...

The original version of this story appeared in Quanta Magazine. In October, a Falcon Heavy rocket is scheduled to launch from Cape Canaveral in Florida, carrying NASA’s Europa Clipper mission. The $5 ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has detected a new "hot Jupiter" exoplanet. The newfound alien world, estimated to be nearly three times ...

Jupiter hosts more than 100 moons, with most attention focused on the four Galilean moons: Io, Europa, Ganymede and Callisto.

Washington, D.C. - After 15 years of observation and lots of patience, the world's premier planet-hunting team has finally found a planetary system that reminds them of our own solar system. At a ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have confirmed the existence of an "extraordinary" hot ...

Jupiter and Saturn will be so close today that they will appear to form a "double planet." Such a spectacular great conjunction, as the planetary alignment has come to be known, hasn't occurred in ...

Add Yahoo as a preferred source to see more of our stories on Google. Jupiter, the solar system's largest planet, used to be even bigger, according to a new study. The cloud of gas and dust from which ...