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Elon Musk 24 Nov 15
It is, however, important to clear up the difference between "space" and "orbit", as described well by
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Elon Musk
Getting to space needs ~Mach 3, but GTO orbit requires ~Mach 30. The energy needed is the square, i.e. 9 units for space and 900 for orbit.
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Michael Sitarzewski 🧒 24 Nov 15
Replying to @elonmusk @JeffBezos
. Suggesting has a small rocket?
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Dave Robinson 24 Nov 15
Yep, Blue Origin is cool, but it's not in the same sandbox as SpaceX
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Trevor S. Valle 24 Nov 15
Replying to @dcrwrites @elonmusk
Right now, it's a race between BO and VirginGalactic in tourism, while is launching crew to ISS.
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Daniel 🌳🌳🌳🌳 24 Nov 15
Replying to @elonmusk
's response to getting to : 'Nice model rocket guys! Next time try for orbit, and in a real spacecraft.'
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Bruce Hoult 24 Nov 15
Replying to @elonmusk
seems unfair to pick GTO. That’s almost the same as going to moon or Mars, and a lot more than LEO which is genuine β€œorbit”.
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David C McGarry 24 Nov 15
Replying to @BruceHoult @elonmusk
Even for LEO, the first stage is still going Mach 10, and the second stage about Mach 23 at an altitude of 200 km.
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Maggie Owen-Keister 24 Nov 15
Replying to @elonmusk
It's ok to be a little angry that someone else did it before you Elon. But try to have some class when responding to tweets.
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Lunartock 24 Nov 15
He did. He congratulated them. Then he tried to explain the difference between Space and Orbit to the public.
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Erik Nordeus 24 Nov 15
Replying to @elonmusk
But once you have reached orbit, you are halfway to anywhere
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andi 24 Nov 15
Replying to @elonmusk
does the inertia of a BH body depend upon its energy content or gravity content?
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Abu Sarah 24 Nov 15
Replying to @elonmusk
@croftandi Isn't inertia always mass dependent - the amount of mass and it's distribution about the axis of rotation.
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