A

David

Darling

Castor and Pollux (French satellites)

Pollux (D5-A)

Castor and Pollux were a pair of French microsatellites, also known as D5A and D5B, launched unsuccessfully on May 21, 1973, by a Diamant B from Kourou.

 

Castor was to have studied interstellar space and collected aeronomy and geodesic data; Pollux was to have tested a hydrazine propulsion system.