Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

NASA’s New Horizons mission changed our understanding of the outer solar system. After its famous Pluto flyby, it traveled ...

Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

The "Star Trek" legend's only son will discuss his memoir at the annual space-themed event.

On this date, Jan. 19, 2006, the first probe ever destined to visit Pluto, its moons and other Kuiper ... Boeing expects more Florida layoffs, NASA's SLS future remains unknown Supermarket shakeup ...

Astronomers have been plotting a return of New Horizons to Pluto, with a potential new mission called Persephone. You can see NASA's concept for the potential mission here. After visiting the ...

Pluto seemed hopelessly cold and distant until 2015, when NASA’s New Horizons space probe beamed back images of the giant heart-shaped mark that dominates the dwarf planet’s surface.

To get somewhere in outer space, you can’t exactly drive in a straight line. Orbits are tricky things, and sending a probe to ...

New Horizons project manager. Ultima Thule, at 4 billion miles (about 6.4 billion km) from the Sun and 1 billion miles (about 1.6 billion km) from Pluto, will be the most distant object ever directly ...

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