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A comment on Seven earth-sized planets discovered circling a star 39 light years from Earth. Parent comment

Re:Seven earth-sized planets discovered circling a star 39 l... by ohitsdom on Wednesday February 22, 2017 @01:40PM (#13707931)
Upvote for doing the math, but we're going to have to ditch traditional chemical rockets for this kind of trip. Fortunately, we're making progress on alternatives.

https://arstechnica.com/science/2017/02/nasas-longshot-bet-o...

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Re:Seven earth-sized planets discovered circling a star 39 l... by ahh on Wednesday February 22, 2017 @01:54PM (#13708106)
Note that he's not giving a figure for a chemical engine, but a fusion engine (sometimes termed a "torchship" due to the absurd power involved.) That would be strictly more efficient than VASIMR or similar. The figure would be even more ludicrous with a LOX/LH2 engine.

(I did not check his math, however.)

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