A few years later, significant results were produced by three NASA spacecraft: Deep Space 1 reached the Comet Borrelly in 2001. Just three years later, NASA's Stardust mission collected dust particles ...

This innovative propulsion concept was first used in 1998 on NASA’s Deep Space 1 mission to Comet Borrelly. In 2004 the Europeans successfully tested their own ion propulsion system on the Smart 1 ...