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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 pm90 on Wednesday February 22, 2017 @01:28PM (#13707793)
What if we used engines powered by nuclear energy (fission or fusion)? Could we reduce the amount of fuel, since the energy density is so much higher?
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Re:Seven earth-sized planets discovered circling a star 39 l... by Sharlin on Wednesday February 22, 2017 @01:34PM (#13707865)
The GP already posits a theoretical perfect fusion drive.
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Re:Seven earth-sized planets discovered circling a star 39 l... by pm90 on Wednesday February 22, 2017 @01:44PM (#13707978)
Ah, yes. My bad.
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Re:Seven earth-sized planets discovered circling a star 39 l... by janekm on Wednesday February 22, 2017 @01:37PM (#13707893)
This estimation was already assuming a fusion engine.
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Re:Seven earth-sized planets discovered circling a star 39 l... by mcculley on Wednesday February 22, 2017 @01:39PM (#13707916)
You still need reaction mass.
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