Breaking space news, the latest updates on ... Related: New Horizons Pluto probe notches 3 new discoveries in outer solar system ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...

Breaking space news, the latest updates on rocket launches, skywatching events and more! He called this hypothetical world "Planet X." "In some ways, Pluto's more of a planet than some of the ...

The puzzle of predicting how three gravitationally bound bodies move in space has challenged mathematicians for centuries, and has most recently been popularized in the novel and television show '3 ...

This high-resolution image captured by NASA's New Horizons spacecraft combines blue, red and infrared images to show a bright expanse on Pluto ... outer heliosphere, said Andrew Poppe of the Space ...

Because of this, the IAU reclassified Pluto as a dwarf planet, a category that includes other small, round objects in the outer solar system. Despite the change, Pluto remains a beloved celestial ...