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David Hammen

I'm an ex-ex-rocket scientist. I briefly left the NASA fold to work at a startup filled mostly with similar ex-rocket scientists. We applied what we learned about making rockets reliably, economically, and safely move from point A to point B to all kinds of other devices that move from point A to point B. I came back to the NASA fold because, in hindsight, that was not the best time to make the jump to oil and gas (upstream).

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Top posts (202) All Questions Answers | Votes Newest

28 Why can't our Sun be a binary with Jupiter as a T or Y dwarf? Jun 5 '16
28 Is the Earth-Sun distance 1.012 AU? May 18 '16
27 Why does the Earth have a z-component at the start of the J2000 epoch? Jul 14
27 Will Earth lose the Moon before the Sun goes into supernova? Nov 20 '14
22 Is there any planet/star bigger than VY Canis Majoris? Jan 20 '15
21 How did the Earth come to be in orbit around the sun? Jun 6 '16
20 Why can't we see distant galaxies with the naked eye? Jan 15 '15
19 How does the Moon's gravity affect Earth's oceans despite Earth's stronger gravitational pull? Aug 15
19 Does a star fuse helium to beryllium on the main sequence? Nov 5 '18
19 Why is the Earth-Moon distance not the same at each perigee/apogee? Jan 24 '18
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