Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...

Planet nine may be orbiting far from the Sun, at the edge of our solar system. Astronomers, seeing odd irregularities in the orbits of the outer planets suspect another, unknown, planet may orbit ...

Scientists believe that there could be a ninth planet in our solar system, lurking somewhere beyond Neptune—but don't get too excited, because this isn't about Pluto. That's according to two ...

Though researchers continue to hunt for the mysterious Planet 9, experts have discovered evidence that another planet, residing between Uranus and Saturn, "escaped" billions of years ago. The research ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are added to the count on a rolling basis by scientists from around the world, ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in ...

In the distant future—about six billion or seven billion years hence—the sun will start to die, swelling up into a bloated red giant. In a span of several hundred million years it will blow away its ...

In the solar system’s early years, the still-forming giant planets sidestepped, did a do-si-do and then swung one of their partners away from the sun’s gravitational grasp. Things settled, and our ...

An astronomer has explained why all of the planets in our solar system are roughly sitting on the same orbital plane. According to Nader Haghighipour, an astronomer at the University of Hawaii who ...