Talk about far out. NASA's unmanned New Horizon spacecraft, now zooming into outer space beyond Pluto, will fly by a small space rock known as Ultima Thule on New Year's Day.

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

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

SPACE.com asked some experts to weigh in onthis debate, ... Pluto has family inthe outer solar system." Tyson was one of the first to push forPluto's demotion. A decade ago, ...

The James Webb Space Telescope (JWST), operated by NASA, has uncovered intriguing new details about Charon—Pluto’s largest ...

Painting depicting the new horizons space probe as it approaches Charon, Pluto's moon. Dated 2015. (Universal History Archive/Universal Images Group via Getty Images) ...

NASA's New Horizons Pluto probe is gearing up to cross the "termination shock," an exotic boundary in the outer solar system, as early as 2027.

As the fifth anniversary of Pluto's demotion neared, SPACE.com caught up with Brown to chat about that controversial decision, dwarf planets and what we're learning about the outer solar system.

Earth has a newly-discovered neighbor in the solar system.. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

Check out the naming themes for Pluto and its five moons. ... Miriam Kramer worked as a staff writer for Space.com for about 2.5 years before joining Mashable to cover all things outer space.

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