A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

The Solar System is a vast and mysterious realm, filled with planets, moons, asteroids, and icy bodies waiting to be ...

Astronomers have hoped for the existence of Planet Nine for years. Things were looking promising, but this discovery might ...

(Web Desk) - Astronomers have discovered a new world circling the outer edges of our solar system. Researchers using the ...

It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

Researchers use the Subaru Telescope in Hawaii to find a small object on the outer edge of the Solar System. Nicknamed ...

Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get ...

Sedna, a distant dwarf planet three-quarters the size of Pluto, is inching toward the brightest star in our sky — and in 2076 ...

If it weren't for the new budget, New Horizons could keep exploring the outer reaches of the solar system into the 2030s.

It was one of the most ambitious missions for NASA since the turn of the century, with photos reshaping what scientists know ...