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Comment Re:Specific impulse (Score 1) 47

"All rockets basically do is throw mass out the back to move forward with an equal and opposite reaction since we don’t have massless drives like using light for propellant."

Photons have mass. So you can get thrust by shoving light out the back. Of course you can't get to orbit that way, but from Earth orbit to Mars orbit it would work.

Comment Electricity source (Score 1) 152

"Electricity isn't something that needs to be conserved - it's not shipped around the world in any significant quantity and generally is made as it's used"

Wrong

In much of the world the main source of electricity is Natural Gas.
Which is fine if you live in North America, but for EUrope and Asia it has to be imported. Because of damage to the LNG facilities in the Gulf, production won't be back to full capacity for years, even after the Strait of Hormuz is reopened.

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