A community for discussing SpaceX.
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Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:
| Fewer Letters | More Letters |
|---|---|
| CST | (Boeing) Crew Space Transportation capsules |
| ~ | Central Standard Time (UTC-6) |
| EVA | Extra-Vehicular Activity |
| MMOD | Micro-Meteoroids and Orbital Debris |
| Jargon | Definition |
|---|---|
| Starliner | Boeing commercial crew capsule CST-100 |
[Thread #52 for this sub, first seen 20th Aug 2024, 05:10] [FAQ] [Full list] [Contact] [Source code]
Interesting title on the video about this, just uploaded to YT by CBS News: SpaceX sending private citizens on risky mission that includes spacewalk attempt
I find myself agreeing with the sentiment. I'm fairly nervous about this mission.
Don't get me wrong, I'd jump at the chance to join it. I'd choose it over a routine trip on Starliner, but not for the reason you might be thinking. ... I can't help wondering if Polaris Dawn is both higher risk and reward than a routine trip on Starliner.
Thanks for sharing the video! I'm always interested in seeing mainstream coverage of this stuff. However, they really don't know what they're talking about. For example, the host says they're going to higher altitudes than the Apollo program, which is just utterly baloney. Really throws a wrench into the credibility of this news outlet, in my view at least.
As for whether this mission is risky, yes it absolutely is. However, all manned space missions are risky and this one doesn't really have anything that makes it fundamentally unsafe.
Look, NASA sets objectives to accomplish its missions to the ISS, and they work with the engineers at SpaceX to figure out how to accomplish them as safely as possible. These Polaris missions are fascinating in that the objectives are set jointly between the SpaceX team and a paying customer.
The customer is interested in a few things, but it probably comes down to fame for doing new things. SpaceX is interested in developing the technologies and raising funds to get to Mars. Where their goals overlap is how we get the Polaris missions. I think that's pretty cool!
the host says they’re going to higher altitudes than the Apollo program
Ah, yes, well normally that would be my opportunity to remind people of Gell-Mann amnesia.
But this time it's unfair to the host. Isaacman has made that mistake himself on (I think) multiple occasions. She might have got it from him. (Perhaps indirectly.) Here's one: https://youtu.be/aASZ2rKdS6I?t=1m2s (He meant "since", not "than".)
this one doesn’t really have anything that makes it fundamentally unsafe.
You're probably right, but we'll see. The altitude and the spacewalk are the first big new initiatives for SpaceX's human spaceflight work that haven't been done under close NASA supervision. That's probably a good thing but ... I'm nervous.
Talking of the altitude, this is from the article:
The mission is scheduled to launch between 3:30 and 7 a.m. Eastern Aug. 26 in one of three instantaneous launch windows. Isaacman said the launch times were selected by SpaceX to minimize the micrometeoroid and orbital debris impact risk to the mission given its unconventional orbit.
He said it during the event (which is available to watch here), and I don't think any further explanation was given for why certain launch times are better than others for MMOD. Does anyone understand why? Is it obvious? Any resources I could check out to learn more?
Talking of the article, they still haven't fixed the first sentence!:
spacewalk on a is ready
If Jeff or anyone else from Space News is reading this, hire me as your proofreader!
the host says they’re going to higher altitudes than the Apollo program
Ah, yes, well normally that would be my opportunity to remind people of Gell-Mann amnesia.
But this time it’s unfair to the host. Isaacman has made that mistake himself on (I think) multiple occasions. She might have got it from him. (Perhaps indirectly.) Here’s one: https://youtu.be/aASZ2rKdS6I?t=1m2s (He meant “since”, not “than”.)
One source of confusion might be if this crew is planning to be in the highest 'free' orbit of Earth ever occupied by humans. Where I'm using 'free' as a vague way of trying to exclude, for example, the astronauts who were actually on the moon (which is of course orbiting the Earth).
Is that a scientifically/technically legitimate & meaningful distinction? If so, is there a better term for it?
Was this the one that was also going on a basically polar orbit?
I LOVE that already there are enough commercial space missions happening that it's easy to get confused which one is which! The more the merrier imo :)
No, that's this one, funded by a crypto billionaire, announced a week ago and launching in ~4 months.
Polaris Dawn is funded by a payments processing billionaire, announced 2.5 years ago, and launching this month.
And Polaris Dawn is actually going to be doing something interesting - testing brand new EVA suits, possibly in preparation for future service missions.
The other mission is only interesting because no humans have flown a polar orbit yet. That’s more of a tourism first than an engineering/science benefit.
They will go through the Van Allen Belt to study the radiation there and the first commercial EVA ever !
This is a huge milestone for SpaceX and commercial space exploration.