The grafting on of Uranus, Neptune and Pluto into the astrology discourse was done on an ad-hoc basis.

The name " Pluto " was reportedly suggested by Venetia Burney, then an 11-year-old English school girl, who died in April 2009, having lived to see the reclassification of Pluto as a dwarf planet.

The name Pluto was officially adopted on May 1, 1930.

After it was shown that at least one such body was larger than Pluto, on August 24, 2006 the International Astronomical Union ( IAU ) reclassified Pluto, grouping it with two similarly sized " dwarf planets " rather than with the eight " classical planets ".

It has a relatively high orbital inclination, but at the time of Tombaugh's discovery of Pluto, Makemake was only a few degrees from the ecliptic near the border of Taurus and Auriga at an apparent magnitude of 16.

This actually was not his first work in comics, as earlier the same year Barks along with Hannah and fellow storyman Nick George scripted Pluto Saves the Ship, which was among the first original Disney comic book stories published in the United States.

* 1979 – Pluto moves inside Neptune's orbit for the first time since either was discovered.

De Camp and Ley also claim that Sir John Leslie expanded on Euler's idea, suggesting two central suns named Pluto and Proserpine ( this was unrelated to the dwarf planet Pluto, which was discovered and named some time later ).

The third part of Icehenge was originally published as the novella On the North Pole of Pluto in 1980 in the anthology Orbit 18 edited by Damon Knight.

The dwarf planet Pluto was discovered as late as 1929, the delay mostly due to its small size, far distance, and optical faintness.

Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially considered the ninth planet until 2006.

In 1978, Pluto was found to be too small for its gravity to affect the gas giants, resulting in a brief search for a tenth planet.

When Pluto was discovered 19 years later, its mean distance of 39. 48 AU and orbital period of 248 Earth years were close to Ketakar's prediction ( Pluto in fact has a 2: 3 resonance with Neptune ).

At that time Pluto was too far above the ecliptic to be imaged by the survey.

" Unbeknown to Pickering, four of the photographic plates taken in the search for " Planet O " by astronomers at the Mount Wilson Observatory in 1919 captured images of Pluto, though this was only recognised years later.

Although he is best known for discovering the dwarf planet Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt, Tombaugh also discovered many asteroids ; he also called for serious scientific research of unidentified flying objects.

He discovered hundreds of asteroids, beginning with 2839 Annette in 1929, mostly as a by-product of his search for Pluto and his searches for other celestial objects.

Tombaugh discovered nearly 800 asteroids during his search for Pluto and years of follow-up searches looking for another candidate for the postulated Planet X. Tombaugh is also credited with the discovery of comet C / 1931 AN, though its orbit is currently unknown.

* 1978 – Charon, a satellite of the dwarf planet Pluto, is discovered by American astronomer James W. Christy.

While eight of the planetary bodies discovered before 1950 remain " planets " under modern definition, some celestial bodies, such as Ceres, Pallas, Juno, Vesta ( each an object in the Solar asteroid belt ) and Pluto ( the first-discovered trans-Neptunian object ), that were once considered planets by the scientific community are no longer viewed as such.

Aside from Pluto itself and Charon, the first plutino, 1993 RO, was discovered on September 16, 1993.

In 1930 Clyde Tombaugh, working at the Lowell Observatory, discovered Pluto near the location expected for Planet X.

Eris, at the time thought to be the largest TNO, was discovered in 2005, revisiting a long-running dispute within the scientific community over the classification of large TNOs, and whether objects like Pluto can be considered planets.

*, the prototype cubewano, the first Kuiper belt object discovered after Pluto and Charon.

*, the first binary Kuiper belt object discovered after Pluto and Charon.

* 1993 RO, the next plutino discovered after Pluto.

The planet Pluto was discovered in 1930 on the edge of the solar system, although in the early 21st century, it was reclassified as a plutoid instead of a planet proper, leaving eight planets.

** Charon, a satellite of Pluto, is discovered.

In 2008, a trans-Neptunian object with a retrograde orbit similar to Halley's was discovered,, whose orbit takes it from just outside that of Uranus to twice the distance of Pluto.

In 1930, Pluto was discovered using one of the observatory's telescopes.

Burdett was the childhood home of Clyde Tombaugh, the astronomer who discovered Pluto.

Pluto was discovered using photographic plates in a blink comparator ; its moon Charon was discovered 48 years later by carefully examining a bulge in Pluto's image on a plate.

* 1930 – While studying photographs taken in January, Clyde Tombaugh discovers Pluto.

The search for these led to the discovery of Pluto in 1930.

The discovery of Pluto in 1930 confounded the issue still further.

* 1930 – Clyde Tombaugh discovers Pluto

Pluto, also called Pluto the Pup, is a cartoon character created in 1930 by Walt Disney Productions.

All together Pluto appeared in 89 short films between 1930 and 1953.

Pluto first appeared as a nameless bloodhound tracking escaped convict Mickey in the film The Chain Gang ( 1930 ).

Several months had passed between the naming of what was believed to have been the ninth planet, Pluto, on March 24, 1930, and the attachment of that name to the dog character.

Also located on the Mars Hill campus is the 13-inch ( 0. 33 m ) Pluto Discovery Telescope, used by Clyde Tombaugh in 1930 to discover the dwarf planet Pluto.

* The dwarf planet Pluto by Clyde Tombaugh in 1930.

In the Mickey Mouse series he continued to add personalities to his characters ; this resulted in the creation of new characters such as Pluto with The Chain Gang in 1930, Goofy with Mickey's Revue in 1932 and Donald Duck in 1934 with The Wise Little Hen ( under the Silly Symphony series ).

At the time of the discovery of the planet Pluto in 1930 Lovecraft himself very casually suggested, in a letter to a friend, that Yuggoth might " probably " be the same as Pluto.

Years before, he had given $ 10, 500 to purchase a 13-inch telescope for his deceased brother Percival's Lowell Observatory, which in 1930 gained fame as the Pluto Discovery Telescope.

At the time of its discovery it was the intrinsically brightest object found in the Solar System since Pluto in 1930.