When Will Pluto  Since Its Discovery?

Complete Its First Orbit

to wait a while to celebrate the first complete orbit of Pluto since its discovery.

Astronomers will have

Feb. 18, 1930, using the Lowell Observatory in Flagstaff, Arizona. American astronomer Clyde Tombaugh found a moving object clearly beyond the orbit of Neptune.

Pluto was discovered on

solar system tend to orbit near the ecliptic, which is the plane of the solar system. Pluto, however, is quite inclined compared with Earth and many others at 17 degrees.

The larger worlds of our

at 44 degrees, noted the Lowell Observatory's Will Grundy, co-investigator on NASA's New Horizons(opens in new tab) mission

The world Eris exceeds that

 Alan Stern, of the Southwest Research Institute, noted there are four things to consider about Pluto's orbit.

New Horizons principal investigator

"Pluto and Charon are really a double planet," and that should be considered when mapping the orbit of the system.

Grundy said,

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