He piloted Apollo 16 and commanded the shuttle. But he may be best known for the mission he didn't fly: the ill-fated Apollo 13. And he worried late in life about the high cost of human space flight.

A one-of-a-kind tool used on the NASA Apollo 16 mission in the 1970s is up for grabs to the highest bidder. The tool is expected to go for over $750,000.

Thomas K. Mattingly, a key commander during the Apollo 16 mission to the moon, died at age 87, NASA announced Thursday. Mattingly, known as Ken or T.K., died on Oct. 31, NASA confirmed in a statement.

NASA astronaut Ken Mattingly, who orbited the moon during the Apollo 16 mission, has died. He was 87. The space agency confirmed Mattingly died on Tuesday.

ARLINGTON, Va. — Astronaut Thomas "Ken" Mattingly, who orbited the moon on NASA's Apollo 16 mission and narrowly missed the ill-fated Apollo 13 mission, died Tuesday at age 87, NASA said.

Apollo 16 astronaut and moon walker Charlie Duke, left, speaks with former NASA astronauts José Hernández, center, and Christopher Cassidy during a ceremony at Kennedy Space Center Visitor ...

Apollo 16 crew shown at Kennedy Space Center The black-and-white image shows astronauts Charles Duke, John Young and Thomas (Ken) Mattingly standing next to a lunar rover, but the men are not on ...

A key tool used in the successful Apollo 16 mission is up for grabs in a new auction. The moon scoop that successfully collected samples of rock from the moon in 1972 can finally be yours.

Apollo astronaut Ken “TK” Mattingly, known for orbiting the moon and helping the crew of Apollo 13 return to Earth in the 1970s, died Tuesday, NASA announced. He was 87.

ARLINGTON, Va. — Astronaut Thomas "Ken" Mattingly, who orbited the moon on NASA's Apollo 16 mission and narrowly missed the ill-fated Apollo 13 mission, died Tuesday at age 87, NASA said.