NASA plans to auction off the artifacts of Apollo lunar missions
which will take place from 14-19 April in New York City.
This is a night when many of the most familiar lunar features are visible, including the landing sites of some of the Apollo lunar missions
To create trajectories for the Apollo lunar missions
, for instance, engineers calculated how Earth's gravity would affect the spacecraft at the beginning of its trip and how the moon's gravity would affect the craft toward the end.
(The photos alone could justify the cost of the disc.) Six movies are short clips from the Apollo lunar missions
and the other 23 are looped animations that demonstrate astronomical concepts such as telescope optics and the brightness variation of an eclipsing binary.