In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

Planets with unusually wide orbits may be normal by-products of the formation of planetary systems. This is suggested by new simulations.

Twenty years ago, Congress gave NASA a directive: find 90% of the near-Earth asteroids that could potentially harm our little ...

The lone planet confirmed to be in the system is squeezed in between the two, orbiting at a distance similar to Earth's ...

As the rocky planets begin to settle into their orbits, Proto-Earth and Thea uncover the Sun’s true purpose for the Solar ...

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There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

Asteroids are considered potentially hazardous asteroids (PHA) if they have a diameter of at least 140 metres and come within ...

JR is an Apollo class, defined by the Earth-crossing orbits. With a speed of around 40,800 kilometres per hour (25,356 miles ...

At the very edge of our solar system, beyond the grasp of Neptune and even past the icy sprawl of Pluto’s domain, a new ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.