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

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, ...

The fate of our solar system is written in the stars—well, one star to be precise: the sun. Estimates of what the end will ...

Scientists have revealed a chilling glimpse into our solar system's future, and it looks like doomsday might come a lot ...

New modeling suggests the outer planets may not survive the sun’s final act for nearly as long as scientists once believed.

Imagine if the planet Jupiter orbited much closer to the Sun. What effect would a so-called hot Jupiter have on our Solar ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Theorbits of Jupiter, Saturn, Uranus and Neptune may have been altered ...

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

The Sun’s death is not an event the planets will quietly survive—it is the trigger for their orbital undoing.” ...

Astronomers have proposed Planet Y, a hypothetical world that could be orbiting unseen in the far reaches of our solar system. Find out more in this short video from EarthSky’s Will Triggs. Is Planet ...

In the process of thinking about "Why can sci-fi movies head to their destination stars without hesitation?", I realized that ...

For the first time, astronomers have detected radio signals from a planet beyond our solar system, according to a study available on the preprint server arXiv. The landmark observation offers a new ...