Add Yahoo as a preferred source to see more of our stories on Google. Voyager 1, shown in this illustration, has operated for decades thanks to a radioisotope power system. NASA via AP Powering ...

[This article was first published in Army Sustainment Professional Bulletin, which was then called Army Logistician, volume 2, number 4 (July–August 1970), pages 18–21. The text is reproduced as ...

Powering spacecraft with solar energy may not seem like a challenge, given how intense the Sun’s light can feel on Earth.

Benjamin Roulston does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...