Recent comments in /f/space

NoisyGog t1_jd26qob wrote

Reply to The effects of Red Shift by SimplyZer0

Signals used for communication use a few different systems, which would mitigate overall frequency change due to red and blue shift.

In analog systems, FM is the most common. This uses a carrier wave, and alters its frequency to impart information. That entire carrier wave would be higher or lower in frequency, but once you pick it up, the changes to it representing the information would still be fine. Imagine having to tune your radio to 94 MHz instead of 97MHz, but still receiving the same signal.

In digital transmission, it’s very common to have a “clock” pulse embedded in the signal. This clock effectively tells the receiving system what frequency it’s at, and where the data packet begins and ends.

Neither such system would have an issue with a red or blue shift.

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Reddit-runner t1_jd26fdn wrote

Reply to comment by Bigjoemonger in The SpaceX steamroller has shifted into a higher gear this year by returnofjuju

>The success of the Falcon 9 launches is on the personnel actually doing the work, not musk.

That would mean SpaceX is the only company in the world with competent engineers.

Do you really want to argue that?

Intelligence and talent is more or less equally distributed among the engineers in the grand scheme of thing.

What sets SpaceX apart from all other space companies is the single-minded leadership with actual technical knowledge and understanding. And the personal freedom to make bold decisions.

Look at Blue Origin. That's what you get with good engineers but leadership without engineering knowledge.

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CMDR_Shazbot t1_jd23fvg wrote

Reply to comment by didi0625 in The SpaceX steamroller has shifted into a higher gear this year by returnofjuju

How is that inflated? They're literally designing, building, launching, maintaining, and recovering their own products. The only difference between a customer launch and their own are tolerances, mission design, and who's paying them. If rocketlab (also love them) was building and putting up their own satellites weekly, we also wouldn't discount their achievements.

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CMDR_Shazbot t1_jd22zt1 wrote

Reply to comment by arcosapphire in The SpaceX steamroller has shifted into a higher gear this year by returnofjuju

He developed the software for his first company, zip2. Enough to get the POC off the ground and attract investors and hire additional developers to clean up the code, sell it off, build up X.com, sell it off, and fund SpaceX.

No matter how skilled you think he is at it, he is by definition a self taught software developer, who then learned rocket science through the people around him and his employees. People seem to think spending 20 years around literal rocket scientists who are building things for him doesn't cover what you'd learn in 4 years of university.

People dont seem to realize SpaceX is also a software company.

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space-ModTeam t1_jd21ky0 wrote

Reply to Would it work to get 1G in a spacecraft going to Mars using acceleration? by OysteinM

Hello u/OysteinM, your submission "Would it work to get 1G in a spacecraft going to Mars using acceleration?" has been removed from r/space because:

  • Such questions should be asked in the "All space questions" thread stickied at the top of the sub.

Please read the rules in the sidebar and check r/space for duplicate submissions before posting. If you have any questions about this removal please message the r/space moderators. Thank you.

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CMDR_Shazbot t1_jd21agt wrote

Reply to comment by Cycleguy57 in The SpaceX steamroller has shifted into a higher gear this year by returnofjuju

You think he'd what, come back in and fuck it up? Make the f9s do flips and swap propellant to concentrated blue checkmarks? He's been CEO there for 20 years, him and Shotwell got that shit down tight, if there were problems for him to smooth over he'd be there doing it, he's just having fun and looking forward while starship is in development.

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Nerull t1_jd1uavq wrote

Reply to comment by SimplyZer0 in The effects of Red Shift by SimplyZer0

The 2022 Nobel prize in physics did no such thing. It wasn't about information transfer at all. It also isn't new - Nobel prizes are awarded for important work, not new work. On average Nobel prizes are awarded about 15-20 years after a work is published, if that work proves to be important enough. This one did, but its not some breakthrough that we didn't understand until now - it was awarded for work in 80s and 90s that has been the status quo in quantum physics for decades - and that physics, including the physics the prize was awarded for - confirm that no information can be transferred through entanglement.

The most recent paper cited by the Nobel committee in their summary of the work the prize was awarded for was published in 1999.

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The_Solar_Oracle t1_jd1s2bg wrote

Reply to Would it work to get 1G in a spacecraft going to Mars using acceleration? by OysteinM

> . . . I've read that the spinning spaceship (Circular disc) will not be useful, because; issues

There's nothing that makes spin-gravity a show stopper unless the habitat in question is very tiny and rotating fairly quickly, but it's also not a strict requirement for a mission to Mars and that's why it's seldom considered in detailed plans for manned missions to Mars in the near future.

Assuming the slowest normal trajectory (assuming you're not using a very low thrust but still man-rated electric rocket), going to Mars or returning from it takes about eight and a half months. There have already been human beings that have spent more time than that in space within individual missions, and they also fully recovered from any negative effects.

There, however, remains a question mark in regards to how deleterious Mars gravity may or may not be towards the human body. It's quite possible that some gravity, however low, may be enough to stave off the effects typically seen with extended periods of living in zero gravity. Very little observational data on the subject exists, however.

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