After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the ...

Early life. Percival Lawrence Lowell was born on March 13, 1855, to a prominent, wealthy Bostonian family. Son of Augustus and Katherine Bigelow Lowell, young Percival attended Harvard University ...

Schiaparelli discovered 104 canals; Prof. Percival Lowell and his staff of the Lowell Observatory at Flagstaff, Arizona, have discovered over 350, and they regard this number as no limit.

Percival Lowell established his observatory in Flagstaff, Arizona to look for intelligent life on Mars. Eventually it was used to find Pluto (Credit: Alamy) ...

Images of Mars taken from orbiting spacecraft suggest water may periodically appear on the planet’s surface. Over 100 years ago, Percival Lowell thought the “canals” on Mars were evidence of ...

Percival Lowell, born into wealth and influence, had an outsized role in shaping views of the solar system in the fin-de-siècle popular imagination. Credit: Library of Congress/Wikimedia Commons ...

Percival Lowell's theoretical prediction of a ninth planet, "Planet X," initiated a 25-year search at Lowell Observatory, beginning with calculations based on Uranus' orbital perturbations.

Astronomer Percival Lowell, born on this day in 1855, left a very concrete legacy in the form of the Lowell Observatory. His other legacies are less tangible, but have also had lasting effects.

Percival Lowell Theorizes the Existence of a Planet X In the early 20th century, the businessman, astronomer, and founder of the Lowell Observatory in Arizona, Percival Lowell, had a theory .