UPI Almanac for Friday, Oct. 16, 2009.

UPI Almanac for Saturday, Aug. 22, 2009.

WASHINGTON, July 20 (UPI) -- Astronauts aboard the International Space Station Monday celebrated the 40th anniversary of Neil Armstrong and Buzz Aldrin's historic moon walk, NASA said.

WASHINGTON, July 20 (UPI) -- The United States should send humans to Mars, not back to the moon, the crew of Apollo 11 said in a rare joint appearance in Washington.

Neil Armstrong and Buzz Aldrin took the first steps on the moon 40 years ago, topping off one of the greatest feats of mankind.

HOUSTON, July 17 (UPI) -- The Lunar Reconnaissance Orbiter has returned its first images of the Apollo moon landing sites, NASA officials said Friday.

SPACE CENTER, HOUSTON, July 24, 1969 (UPI) -- Thunderstorms in the main recovery area forced a last minute change in the landing area of Apollo 11, heading for a Pacific Ocean splashdown today that will be witnessed by President Richard Nixon.

HOUSTON, July 17 (UPI) -- SPACE CENTER, Houston, June 20, 1969 (UPI) -- Man reached the moon Sunday at 4:17:45 p.m. EDT. Then, for the first time, he set his foot on the soil of an alien world.

SPACE CENTER, HOUSTON, July 20, 1969 (UPI) -- Man reached the moon Sunday at 4:17.42 p.m. (EDT).