Man-made bubble surrounding Earth.

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Profile Chris SCrowdfunding Project Donor
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Message 1868411 - Posted: 20 May 2017, 16:16:34 UTC - in response to Message 1868407.  
Last modified: 20 May 2017, 16:20:16 UTC

Many think cosmic radiation will prove to be a real problem for deep space travel.
You could well be right. We don't really know what is out there between the stars. All we can do is to send probes out to have a look before we risk humans. There may be radiation, there may be damaging cosmic dust. But we are talking maybe hundreds of years into the future for star to star travel where that might matter, we haven't conquered planet to planet travel at home yet!
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Message 1868412 - Posted: 20 May 2017, 16:19:21 UTC - in response to Message 1868409.  

Something akin to the Startrek shields around Enterprise? This was 24th Century sci fi technology, but until we invent the warp drive for FLT travel, I doubt shields will be needed

Many think cosmic radiation will prove to be a real problem for deep space travel.

+1 that's what I was thinking of, not solid objects.

+2 or something:)
Outer space is not a walk in a park.
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Message 1868415 - Posted: 20 May 2017, 16:31:52 UTC - in response to Message 1868411.  

We don't really know what is out there between the stars.


We do know with some certainty of the density of interstellar and even intergalactic hydrogen from Gaussian absorption spectra near the 21cm neutral hydrogen band. It's about 1 atom/cc. If we plan on traveling near lightspeed, these normally harmless atoms are going to become the cosmic rays, and will require shielding of a technological level beyond what we are currently capable.

The hypothetical Bussard ramjet would of course take care of two issues by both removing these atoms and using them as fusion fuel.
“Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has.”
--- Margaret Mead

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Message 1868421 - Posted: 20 May 2017, 16:48:27 UTC

Bussard proposed a ramjet variant of a fusion rocket capable of reasonable interstellar travel, using enormous electromagnetic fields
Interesting because the Star Trek shields were also composed of strong electromagnetic fields. Startrek science was more prophetic than many realised, or the writers read a lot. We haven't quite got replicators for "Earl Grey, hot!" yet, but 3D printing is a first step.
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Message 1868423 - Posted: 20 May 2017, 17:00:37 UTC - in response to Message 1868415.  
Last modified: 20 May 2017, 17:00:58 UTC

The hypothetical Bussard ramjet would of course take care of two issues by both removing these atoms and using them as fusion fuel.

By Robert Zubrin and an associate?
Ok Why not?
But not in this millennium.
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Message 1868425 - Posted: 20 May 2017, 17:05:58 UTC

But not in this millennium.

So you are talking the year 3000 onwards?
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Message 1868428 - Posted: 20 May 2017, 17:32:12 UTC - in response to Message 1868425.  

But not in this millennium.

So you are talking the year 3000 onwards?

Year 3000 ?
On what planet do you live on?
Our universe is about 13 BILLIONS old.
Our planet is about 4 BILLIONS old.
Myself? About 60 years.
Almost old like you are:)
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Message 1868435 - Posted: 20 May 2017, 18:21:55 UTC

I was thinking about using the VLF bubble concept for trips around the solar system within the next 100 years or so to protect against radiation, both cosmic and solar.
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message 1868441 - Posted: 20 May 2017, 18:43:48 UTC - in response to Message 1868435.  
Last modified: 20 May 2017, 18:44:30 UTC

I was thinking about using the VLF bubble concept for trips around the solar system within the next 100 years or so to protect against radiation, both cosmic and solar.

Protection against radiation, both cosmic and solar, are very tricky when sending men/women into space.
But it's doable.
It only takes taxpayers money to do it.
One dollar per year perhaps?
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Message 1868446 - Posted: 20 May 2017, 19:06:38 UTC

I was thinking about using the VLF bubble concept for trips around the solar system within the next 100 years or so to protect against radiation, both cosmic and solar.

Certainly within our solar system and between the planets that might be feasible, but I think science would need to take some big leaps forward from our current knowledge to achieve that within the next 100 years. But yes if we did, then the stars could very well beckon. But not in our lifetimes I would think!
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Message 1868451 - Posted: 20 May 2017, 19:30:41 UTC - in response to Message 1868446.  

Certainly within our solar system and between the planets that might be feasible

Probably necessary.
but I think science would need to take some big leaps forward from our current knowledge to achieve that within the next 100 years.

The technology exists here as the title to the thread states.
But yes if we did, then the stars could very well beckon. But not in our lifetimes I would think!

How true. Our solar system could keep us busy for the imaginable future.
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Message 1868460 - Posted: 20 May 2017, 20:11:24 UTC - in response to Message 1868451.  

How true. Our solar system could keep us busy for the imaginable future.
Most certainly if we find concrete evidence of this elusive 9th planet which is postulated to be there. Some of the outer planet's moons are proving very interesting as well, they will take some getting to!
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Message 1868462 - Posted: 20 May 2017, 20:19:13 UTC - in response to Message 1868460.  

If man achieves space travel a la Star Trek, not that long.
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Message 1868464 - Posted: 20 May 2017, 20:21:43 UTC - in response to Message 1868462.  

I agree entirely, but we first have to discover Dilithium crystals don't we :-)
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Message 1868465 - Posted: 20 May 2017, 20:25:38 UTC - in response to Message 1868464.  

Not necessarily, Scotty managed to produce some when needed :-)

Are you aware that laboratory diamonds have been produced?
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Message 1868469 - Posted: 20 May 2017, 20:41:44 UTC - in response to Message 1868465.  

Lab diamonds are either HPHT or CVD and cubic zirconia since 1976.

Scotty "Oh a keyboard - how quaint!".
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Message 1868471 - Posted: 20 May 2017, 20:43:26 UTC - in response to Message 1868469.  

Lab diamonds are either HPHT or CVD and cubic zirconia since 1976.

Scotty "Oh a keyboard - how quaint!".

So you agree that it is possible. What' s to prevent science from producing what is needed?
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Message 1868472 - Posted: 20 May 2017, 20:46:00 UTC - in response to Message 1868471.  

There just has to be a breakthrough in our current knowledge that currently isn't on the horizon. Let's hope we make that breakthrough one day.
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Message 1868473 - Posted: 20 May 2017, 20:50:35 UTC

Aren't we very off topic now?
Just saying.
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Message 1868496 - Posted: 20 May 2017, 23:21:03 UTC - in response to Message 1868473.  

Aren't we very off topic now?
Just saying.

So, what's new?
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message boards : Science (non-SETI) : Man-made bubble surrounding Earth.


 
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