During the Apollo 15 mission in 1971, astronauts David Scott and James Irwin decided to test a centuries-old proposition about gravity from the Italian mathematician Galileo Galilei.

Dave Scott, Al Worden and Jim Irwin were the crew of Apollo 15, the first mission to use the four-wheel-drive lunar rover. John Young, Ken Mattingly and Charlie Duke of Apollo 16 and Gene Cernan ...

Godspeed, Odysseus! The six-legged robotic spacecraft could become the first American vehicle to land on the moon since ...

NASA's most remarkable achievements include launching Explorer 1 in 1958, the 1969 Apollo 11 moon landing, and the Hubble Space Telescope's universe r ...

the Apollo 14 and 15 moon missions of 1971 put the United States that much closer to the end of its Apollo series of spaceflights. For Russia, the year in space was both triumphant and tragic.

The Apollo IX mission test-flew the command module and ... as captured by the Apollo 15 crew. Like the volcano fields on the Hawaiian island Hilo, some regions of the moon have preserved the ...

January 31-February 9: Alan Shepard, the first American in space, commands Apollo 14 for the third lunar landing, on February 5. July 26-August 7: Apollo 15 lands on the moon with a four-wheel ...