Live data from Hacker News

SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

spacex.com

111–120 of 513 posts

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#111
post #55
post #39

Earlier quoted context omitted.

Well the spacecraft will be tested multiple times before this mission and there are health and fitness tests before departure just like it says there. Both of those were addressed, I think you may have misread this.

You're right I misread the testing part. I'd very much still like to know who those people are and what their thought process is.

I'd like to know the thought process of people who have this much money and don't want to orbit the moon.

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#112
post #102

Earlier quoted context omitted.

Not sure everyone will see it that way. One could look at it as taking the whole "wasteful private jet" to the extreme. Think of the sheer amount of fuel burned in the earth's atmosphere so a rich guy can fly in space. At least, I expect many will spin it that way.

Isn't the exhaust just water?!?

Not for the Falcon 9/Falcon Heavy that will be used in this launch; it uses RP-1 (basically very pure jet fuel, AKA kerosene) and liquid oxygen as fuel.

The Shuttle and the new Space Launch System will use hydrogen/LOX, which exhausts basically water vapor.

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#113
Note that NASA, I believe at Trump's urging, recently said they would try to place humans on the first flight of the Space Launch System (the new heavy lift rocket) - i.e., no unmanned testing first.

https://www.nytimes.com/2017/02/15/science/nasa-looks-to-spe...

Is Musk still maintaining a relationship with Trump? When Uber founder Travis Kalanick left Trump's business council, Musk was still on it AFAIK. I wonder if Musk is doing this or announcing it for related reasons. Certainly Trump has a history, even in his short tenure, of pressuring businesses into announcements that suit his agenda. And the announcement seems to fit Trump's pattern: Impossible, brazen bravado. (Musk gives the impossible some credibility, but that's what is meant by lending someone your credibility.)

It's speculative, but it's also sad and a bad sign when we must look for government interference in the free market at this level, to provide propaganda for the President.

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#114
post #102

Earlier quoted context omitted.

Not sure everyone will see it that way. One could look at it as taking the whole "wasteful private jet" to the extreme. Think of the sheer amount of fuel burned in the earth's atmosphere so a rich guy can fly in space. At least, I expect many will spin it that way.

Isn't the exhaust just water?!?

Is it? I know very little about rocket fuel, but I always assumed that CO2 is involved. A short bit of Googling "composition of rocket fuel exhaust" wasn't immediately helpful. :/

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#115
post #102

Earlier quoted context omitted.

Not sure everyone will see it that way. One could look at it as taking the whole "wasteful private jet" to the extreme. Think of the sheer amount of fuel burned in the earth's atmosphere so a rich guy can fly in space. At least, I expect many will spin it that way.

Isn't the exhaust just water?!?

Mostly CO2 and CO, see for instance https://en.wikipedia.org/wiki/RP-1

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#116

Earlier quoted context omitted.

Same! I also think that spending money on a roundtrip to the moon is way better for humanity than spending it on champagne, caviar and cars.

Not sure everyone will see it that way. One could look at it as taking the whole "wasteful private jet" to the extreme. Think of the sheer amount of fuel burned in the earth's atmosphere so a rich guy can fly in space. At least, I expect many will spin it that way.

The flight is a necessary step toward viable interplanetary travel. Even NASA slung people around the Moon before later flights landed thereon. Gotta send a rocket up & around & back, with passengers, to make progress toward the "colony on Mars" goal, so may as well do it with someone willing to fund a good chunk of the excursion.

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#117
post #57

Earlier quoted context omitted.

> That's an incredibly aggressive timeline Sometimes i wonder if that's an strategy from the management team to put pressure in the engineers.

In the same way that hitting a stuck bolt with a hammer is a strategy. It applies pressure sure, but you break your tools and the nut gets stripped. It seems to a preferred motivation method though.

It worked before. Kennedy's moon shot speech was 8 years and 2 months before Apollo 11 landed on the moon. The speech was made before the US had put a person in orbit.

https://www.youtube.com/watch?v=0T1ztqhYQ7g

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#118
post #79

Is it still a thing, where going to space makes you infertile due to radiation? I feel like I remember basically once you go into space (male or female) kids are off the table afterwards unless you have frozen your sperm or eggs beforehand. Not sure if that was solved at some point or not.

As long as you stay near the Earth (the moon is close enough), our magnetosphere will protect you from radiation.

When you get interplanetary, like on a trip to Mars, radiation exposure becomes arguable the most difficult problem to solve.

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#119
post #62

Earlier quoted context omitted.

Probably not a ton of extra space for a multi-day trip?

That's probably it. Not as much space I think, but life support for an extended period of time. This is one key difference between Dragon/CST-100 and Orion: the latter is designed for extended deep space travel with full crew, and can support them accordingly, while the former are primarily LEO taxis with more limited deep space capabilities.

The problem with the Orion is that there simply aren't many useful missions. Orion can also go around the moon, just like Dragon 2, but for both craft that is the end of the line (at least for Crewed versions).

The difference is that Orion cost about as much as Dragon 1, Dragon 2, Falcon and Falcon Heavy combined. If we add the cost of a SLS launch it goes into another dimension of cost.

Re: SpaceX to Send Privately Crewed Dragon Spacecraft Beyond the Moon Next Year

#120
post #13

So, hmm, we wants to send people around the moon, a year and a half from now, with a rocket he never tested and with a capsule that never flew? I expect half of the directors of SpaceX to resign in the next two days...

I'm not gonna lie...I'd be fine with several directors resigning.
Post reply on HN