Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

According to Dr. Grundy, Pluto is a planet. "I use the word 'planet' to refer to it, and most of the planetary science community does too," Grund ...

His drawings of Mars and Jupiter led to a job at Lowell Observatory. There, two years later, he discovered Pluto. Photograph by Bettmann/Corbis On that late afternoon—it was February 18 ...

In 1928, the amateur astronomer was offered a job at Lowell Observatory in Arizona, where he discovered Pluto. In 1934, he married Patricia Edson. They had two children, Annette and Alden.

At the Lowell Observatory, visitors can conjure their inner astronomer by peering through world-class telescopes and sitting in on lectures on topics like black holes and the history of Pluto.

which relegated Pluto to being a 'dwarf planet' (which according to the IAU resolution is not a planet). His extensive experience and dedication to advancing astronomical research make him a valuable ...