3.3K views · 108 reactions | Astronaut Tim Peake is set to run the London Marathon this Sunday - in space! While most runners will aim to cover the standard 26.2 miles, Tim will travel around the world about two-and-a-half times, as the International Space Station orbits at 17,100mph (27,600 kph). He says he's looking forward to it, despite having to wear a harness to stop him floating off the treadmill. | BBC Science News | Facebook

"Houston, we've had a problem…" The NASA film chronicling the storied Apollo 13 mission and the work to bring Jim Lovell, Fred Haise, and Jack Swigert safely home airs TODAY at 2 PM ET as part of our space history marathon airing all day on C-SPAN 2's American History TV. | American History TV

On July 20, 1969, Neil Armstrong and Buzz Aldrin became the first humans to land on the Moon. Watch this clip from a #NASA film chronicling the historic moment the #astronauts landed. Watch the full film on the #Apollo11 mission this Saturday at 1:30 PM ET as part of our #space history marathon on C-SPAN 2 American History TV. | American History TV

Ed White became the first American to conduct a #spacewalk on June 3, 1965. Watch the full #NASA film on the historic flight this Saturday at 11 AM ET as part of our #space history marathon on C-SPAN 2 American History TV. | American History TV