Astronomers have found icy objects in the outer solar system whose orbits appear anomalous. This video examines the evidence for a possible ninth planet, featuring interviews with the lead researchers ...

For more than three centuries, astronomers asking whether the Solar System is stable have received ever more comforting ...

New evidence suggests that billions of years ago, a star may have passed very close to our solar system. As a result, thousands of smaller celestial bodies in the outer solar system outside Neptune's ...

An early educational game for learning about the solar system, gravitational pull, and other such things. Games metadata is powered by IGDB.com We may earn a ...

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 search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

For the inner four planets in this solar system, each planet orbits the sun three times for every two orbits of the planet immediately to its outside. For the fourth, fifth and sixth planets, they ...