Pluto was discovered in 1930 by American astronomer, Clyde Tombaugh, the Lowell Observatory said. Here's a look at Pluto's history. Pluto was discovered in 1930 by Clyde Tombaugh, an American ...

We bring up this history because it is directly related to the story of Pluto. In 1846, Neptune, the fourth of the giant planets beyond the asteroid belt, was discovered—thirty times farther ...

An curved arrow pointing right. Last July, NASA's New Horizons spacecraft flew by Pluto. The event was one for the history books. Because Pluto is so far, it took time for the spacecraft to ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

For that's the day my father, Clyde Tombaugh, a farmboy-turned-astronomer, discovered Pluto, becoming the first American to find a planet. (Or a dwarf planet, as it's now officially known.) ...

The Sedona Heritage Museum hosted Sedona-based author Diane Phelps Budden and Lowell Observatory historian Kevin Schindler ...

Here are the five most surprising things discovered by the deep-space instrument. After almost a decade in space, the New Horizons probe's close encounter with Pluto lasted just six days as it ...

However, a number of astronomers dispute whether Pluto, discovered in 1930, should really be classified as a planet, because it is so dissimilar from the other eight. Instead, they believe it ...

In this outstanding and educational talk, [Michael Büker] walks us through the history of our understanding ... And if you are still a Pluto-is-a-planet holdout, like we were, [Michael]’s ...

Several, including EB173, are much larger. Pluto was discovered by Clyde Tombaugh in 1930. Many astronomers believe it would be classified as a minor planet in the Kuiper Belt if it were found today.

A stronomer Percival Lowell founded his Arizona stargazing lab in 1894 to aid in his search for life on Mars. While that quest is still ongoing, the observatory made history as the place where ...

or to strip Pluto of its 75-year status as the ninth planet. Mike Brown spoke to Witness History about his discovery and the public outcry that followed. A weekly summary of the big stories from ...