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Comment: Re: AntiGravity (Score 4, Informative) 255

by Brucelet (#43596021) Attached to: Does Antimatter Fall Up?
You'd of course need enough antimatter to balance the weight of the car. Let's call it 1500 kg of antimatter per car. Multiply by 2 for two cars and by 2 again for the mass of normal matter gives 6000 kg total being annihilated. That has an energy equivalent of 5*10^20 joules, which per wikipedia was the total world energy consumption in 2010. This is also equivalent to about 10^5 megatons of TNT or 2000 Tsar Bombas.

Comment: Bad assumption (Score 1) 177

by Brucelet (#43592601) Attached to: Richard Branson Plans Orbital Spaceships For Virgin Galactic

Assuming the cost is on the same scale, would you pay a few hundred grand for a few weeks in orbit?

If the cost were that low, and I had the money somehow, I'd love to spend it on a few weeks in orbit. However, recognizing how much harder it is to get into orbit than to just go straight up, I have strong doubts that costs won't be a factor of 10 or 100 higher. Also, since it's already taken more than twice as long as originally projected for this thing to be ready, I wouldn't expect anything orbital before 2020 or so.

I've got a very bad feeling about this. -- Han Solo

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