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A comment on Magnetoplasma drive could make Mars transit take 39 days?. Parent comment

Re:Magnetoplasma drive could make Mars transit take 39 days? by codeduck on Thursday August 20, 2020 @03:12PM (#24227404)
A million square metres is one square kilometre. It could be built but it would be heavy. A circular sail with a radius of just over 600 metres would do it.
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Re:Magnetoplasma drive could make Mars transit take 39 days? by chasd00 on Thursday August 20, 2020 @06:20PM (#24229698)
wouldn't a million square metered be a megametre and not kilometre?
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Re:Magnetoplasma drive could make Mars transit take 39 days? by codeduck on Friday August 21, 2020 @04:17AM (#24233061)
no. 1000m * 1000m = 1000000m^2 or 1 km^2
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