Pluto was downgraded from a planet to a dwarf planet in 2006 by the International Astronomical Union. The main reason for Pluto's demotion is that it's not able to "clear its orbit of debris." Other ...

FLAGSTAFF, Ariz. (KGUN) — The historic Lowell Observatory, which discovered the now-dwarf planet of Pluto, announced this week that it will drastically reduce internally funded research and shrink its ...

Add Yahoo as a preferred source to see more of our stories on Google. Guests visting the Lowell Observatory in Flagstaff, Arizona during the I Heart Pluto Festival gaze at celestial objects from the ...

At Lowell Observatory in Flagstaff, Route 66 history meets science, space discovery and moon mission training.

A new study has highlighted a striking, size-dependent trend in the compositions of near-Earth asteroids (NEAs). By analyzing ...

Lowell Observatory comes out on top, claiming the Best Northern Arizona Attraction status in this year's Best of Flag. Sitting on Mars Hill, Lowell Observatory looks over downtown Flagstaff and is ...

Lowell Observatory has sat on Mars Hill above Flagstaff for 130 years. Lowell Observatory researchers helped discover that ...