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Discovery
Originally called Planet X, (the ninth planet of our solar system) was discovered by Clyde Tombaugh at Lowell Observatory in Flagstaff, Arizona. -
Naming the Planet
The Lowell Observatory later announced Clyde Tombaugh's discovery and entitled the planet, Pluto. -
Going Public
Pluto first publicly announced as the name of the newly discovered planet on this day. By Venetia Phair who mentioned it to her grandfather, a librarian Falconer Madan who later told his friend Hall Turner a professor of astronomy at Oxford. -
New Moon
Astronomer Janes Christy, while working at the United States Naval Observatory, discovered that Pluto had a moon, which he named Charon. -
Moving of the Planet
As time pasted Neptune was slowly becoming the outermost planet as Pluto moved much closer throughtout the galaxy, due to their highly elliptical orbits. -
Bon Voyage
The Pioneer 10 spacecraft crossed Pluro's orbit, speeding on its endless voyage through the Milky Way. -
Death of Founder
Clyde Tombaugh, who discovered Pluto died in New Mexico. -
More Moons
It was reported that Pluto has 3 moons, not one according to new images from the Hubble Space Telescope. The two moons were named Nix and Hydra. -
Going to the Roots
NASA launches its New Horizons spacecraft On a mission to Pluto following a 2 day delay. Tia spacecraft carried ashes of Clyde Tombaugh, who discovered Pluto. -
UB313
The Jounral Nature reported that object UB313 is larger than Pluto according to Gernan heat calculations. -
Christening
The pair of moon were finally officially christened Nix and Hydra by the International Astronomical Union, which is in charge of approving celestial names. -
Goodbye
Leading astronomers meeting in Prague declared that Pluto is no longer a planet under historic new guidelines that diwnsize the solar system from nine planets to eight. -
Many More Moons
NASA said that the Hubble Space Telescope had found a 4th moon circling Pluto. -
One More Moon
U.S. Astronomer Mark Showalter of the SETI Institute said he has detected a 5th moon around Pluto. Showalter used Hubble Space Telescope and said the new moon was to be named P-5 and is about 6-15 miles across. -
Naming Moons
The International Astronomical Union announced the names of Kerbero and Styx for two new moons of Pluto. -
Dwarf
The New Horizons spacecraft flew just 7,800 miles from Pluto to take the first high resolution images of the now dwarf planet.
