As planetary systems evolve, gravitational interactions between planets can fling some of them into eccentric elliptical orbits around the host star, or even out of the system altogether. Smaller ...

As far-fetched as it may seem, quirks of orbital mechanics could allow hundreds of planets to be packed around a star ...

Caltech researchers show the Sun's own dying mass ejections will destabilize the outer solar system within a billion years of ...

The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star. Earth has a nearly circular orbit, but some planets outside our solar system, ...

Every planet moves around the Sun at its own pace, from Mercury’s 88-day year to Neptune’s 165-year orbit. Orbital periods, rotation times, speeds, and solar distance reveal how differently time works ...

“The Sun’s death is not an event the planets will quietly survive—it is the trigger for their orbital undoing.” Reading time 3 minutes Our Sun is just like any other star. That is, eventually the Sun ...

Gravity not only maintains the stability of these orbits but also influences phenomena like tides on Earth, caused by the moon's gravitational pull. The paper, authored by David Jewitt from the ...

A massive interstellar object passing through our solar system during its formative years likely altered the orbits of planets into trajectories observed today, a new study says. Interactions with ...

Astronomers have revealed new research showing that millions of new solar system objects are likely to be detected by a brand-new facility, which is expected to come online later this year.

EVANSTON, Ill. — Except for the fact that we call it home, for centuries astronomers didn’t have any particular reason to believe that our solar system was anything special in the universe. But, ...