Charles Stross thinks a US circumlunar expedition is on the cards for just two years ahead, and he might well be right:
If Donald Trump is still president, US astronauts will return to circumlunar space around July 16th, 2019 …
That’s the 50th anniversary of the launch of Apollo 11. It’s also 6-12 months on from the projected date of Musk’s translunar tourist trip on a Falcon Heavy.
I expect Falcon Heavy to be delayed a few months, minimum, because no new launch vehicle ever flies on time, especially a crew-rated one, but it’s currently due to fly around December this year for the first time, with a vehicle currently undergoing integration at Cape Canaveral and commercial orders for subsequent flights. It’s rather hard to describe it as vaporware at this point. The same goes for the Dragon 2 crewed capsule; it’s due for a first uncrewed orbital flight test in March 2018, and a crewed orbital test flight later in 2018.
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I’m making this a prediction, however, because the POTUS factor.
July 2019 lies within the term in office of Donald Trump (or Mike Pence, depending whether impeachment/removal has happened first then). Trump is nothing if not an egomaniac, and offering him the opportunity to make a historic phone call to lunar orbit in front of the TV cameras is a guaranteed ego-stroke. Trump is of an age to have young-adult memories of Apollo and I can’t see the idea not appealing to him if he can take credit for it.
So I’m betting that this is how Musk will fund development of his lunar-orbit capability.
(Terms and conditions: prediction invalid in event of nuclear war, global environmental or economic collapse, Trump and Pence both being impeached, or a Dragon 2 capsule exploding in flight, because any of these things might impact the launch schedule.)
Note: Charles is quite a fan of the impeachment scenario, if you hadn’t picked that up from context. The fact that he’s very much not a Trump fan actually makes his prediction that much more striking: he has no interest or desire to see Trump get a propaganda coup to end his term in office.