For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

WASHINGTON: A group of scientists has found a strange new object about 435 miles wide at the far edge of the solar system. It ...

Billions of years from now, the Sun will swell into a red giant, swallowing Mercury, Venus, and Earth. But that’s not the ...

Asteroids are made of metals and rocky material. There are many asteroids in our Solar System which orbit the Sun in oval or egg-shaped elliptical orbits which can take millions of years to complete.

Six known objects in the Kuiper Belt have elliptical orbits ... objects from the Kuiper Belt orbit in the opposite direction from everything else in the solar system, according to NASA.

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Our solar system may have a ninth ... in the Kuiper Belt have elliptical orbits pointing in the same direction. In addition, objects from the Kuiper Belt orbit in the opposite direction from ...

So exactly how many solar system moons have we found ... "The simplest definition [of a moon] would be an object that is in an orbit around a larger, non-stellar object," Ashton told Live Science.

Scientists have discovered a colossal object approximately 435 miles wide in the frigid outer reaches of our solar system, ...