The TLI placed Apollo on a "free-return trajectory" - often illustrated as a figure of eight shape. This course would have harnessed the power of the Moon's gravity to propel the spacecraft back ...

Crewed by Nasa astronauts Jim Lovell, Jack Swigert and Fred Haise, Apollo 13 was supposed to be the third American mission to land on the lunar surface. During the journey to the Moon, an ...