SpaceX CEO Musk Congratulates Amazon's Bezos on Blue Origin Accomplishment, but Clears up Misunderstandings

Today, Tesla (Nasdaq: TSLA) and SpaceX CEO Elon Musk congratulated Amazon's (Nasdaq: AMZN) Jeff Bezos on his Blue Origin landing a reusable rocket. Bezos is a co-founder of Blue Origin.

Musk also offered a little clarity surrounding the event (what is "space," for example) and the history behind landing a rocket. The following was posted to Twitter on Tuesday:

Congrats to Jeff Bezos and the BO team for achieving VTOL on their booster

— Elon Musk (@elonmusk) November 24, 2015

It is, however, important to clear up the difference between "space" and "orbit", as described well by https://t.co/7PD42m37fZ

— Elon Musk (@elonmusk) November 24, 2015

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.

— Elon Musk (@elonmusk) November 24, 2015

@JeffBezos Not quite "rarest". SpaceX Grasshopper rocket did 6 suborbital flights 3 years ago & is still around. pic.twitter.com/6j9ERKCNZl

— Elon Musk (@elonmusk) November 24, 2015

Jeff maybe unaware SpaceX suborbital VTOL flight began 2013. Orbital water landing 2014. Orbital land landing next. https://t.co/S6WMRnEFY5

— Elon Musk (@elonmusk) November 24, 2015

But credit for 1st reusable suborbital rocket goes to X-15 https://t.co/LSb0f8FLJd
And Burt Rutan for commercial
https://t.co/TGWlNjsyQz

— Elon Musk (@elonmusk) November 24, 2015

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