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

Astronomers have discovered icy rocks in the outer solar system that seem to defy the laws of physics, raising questions ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A leading scientist has told Newsweek about new evidence supporting the ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

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 ...

Planet 9 is the hypothetical ninth planet in our Solar System. Has it finally been found using IRAS and AKARI mission data?

Add Yahoo as a preferred source to see more of our stories on Google. About 4.6 billion years ago, a celestial cloud collapsed, paving the way for our solar system to form. Then, a nebula with strong ...

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

Hello, this is Mu-san.Today, I'm talking about how long the solar system will remain in its current form.The outer planets, ...

Astronomers say they have have detected a radio emission from Beta Pictoris b, an exoplanet 63 light-years from Earth, according to new research.