Question Will there be deep space travel in the next half century

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Catastrophe

The devil is in the detail
SOURAV, You are correct. Even the shortest interstellar journeys are going to take hundreds of years. It is still not certain that we can overcome radiation difficulties at all. Extra weight (maybe a lot of extra weight) will greatly increase fuel requirements. Perhaps we will eventually develop weightless fuel systems, but these may require complicated conversion units. Maybe the radiation problem will keep us here until we are seriously threatened. Mankind is a persistent and innovative plague, and will doubtless try hard to survive. So far, we have lasted but a blink of an eyelid. The dinosaurs lasted about 160 million years.

I do believe that remote control will come first and will persist for many generations, but mankind must plan for eventualities. Sooner or later there will be another Chicxulub event, and we will have to get out of the way. We must plan ahead now.

Cat :)
 
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Even at 0.7% conversion of hydrogen mass to energy is far more powerful than any chemical process. I think fusion is something over 500x more efficient at conversion vs. fission, IIRC.

Yeah, all critical issues in finding the most effective way to travel incredible distances. But chemical burning fuel that must be carried along in huge quantities seems less effective. I haven't dug into this much as we have such a long way to go to get me excited. :)

The idea of using rail guns to accelerate protons (hydrogen ions) into a high speed stream that could be scooped-up by a subsequent spaceship to minimize wasting fuel on fuel, so to speak, makes some sense.
A forgotten problem to a trip to any star is the relative speed and running into a sand grain along the way.
Lota energy released hitting 1.
Faster you go the more problematic that becomes.
We can fend off most particles that have a + or - charge with a large magnetic field but uncharged bits are going to need a serious shield.
A bunch more weight to carry and a lot more energy for the magnetic field..
 
Jun 14, 2021
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Yes Sir, you are right. There may be a lot of problems, but we have to try. Sooner or latter we have to fly out of the Blue Planet. Main problem is fuel. We need a lots of fuel. However, it is not clear (till now) how we fly to another planets some billion of l.y. without storing the fuel in the spaceship.
 
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Catastrophe

The devil is in the detail
"However, it is not clear (till now) how we fly to another planets some billion of l.y. without storing the fuel in the spaceship."

Pardon my asking, as this is probably a difference between US and English English, but over here "till now" is ambiguous. I am assuming you mean til now = up to the present, but it can equally mean (over here) = now, at last, it has become clear, instead of as at present, it still has not yet become clear.

Very often, context would suggest the intention, but not in this case.

Cat :)
 
Jun 7, 2021
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I think you are right concerning deep space travel, but unduly pessimistic concerning the exploration of Mars. I suggest that human exploration of Mars may well occur within 10-20 years if Elon Musk gets his way and he seems quite intent. Time will tell if gets a s far as a permanent settlement, flags and foot prints or if it fails to materialise at all. Why do you think that travel to Mars won't be possible?
Humans on Mars, or any attempts of colonization of Mars, in the next half century is indeed, not possible. This is due to one main reason. Funding.. Now Elon Musk may have his big steel rocket, but that rocket isnt going anywhere without NASA, and without american taxpayer money, The cost is simply to great. Furthermore, in order for there to be a publically funded NASA\Musk mission to Mars, there has to be a "financial or political incentive" to go to Mars, to justify the cost, and to justify the risk of people dying on Mars. And right now, sadly, there is no reason for America to pay money to send some billionaire yahoo to Mars, we have way too many problems that need to be solved here first, and to be honest, thanks to a certain political party, a functioning America, as we know it now, has one foot in the grave, and within a decade will no longer exist as the "United" States.. So if Musk is serious about going to Mars in his lifeteam, he should be courting the russians or china, because the US is in no shape to deal with this right now. .. Until NASA finds something worth the effort and worth the tax payer money to go to Mars, the Perserverence Robot, would have to find living organisms for there to be any thoughts of sending more than robots to Mars.. So perhaps the moon, and Ceres(asteroid belt) is possible, but anything else is a pipe dream.
 
Jul 27, 2021
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DNA seems to be also not ready to travel.
It needs reconstruction technology development (not less than 20 to 30 years).
It needs ethical issues to be resolved.
If anyhow a mission with a robot and DNA is sent, it will need remote babysitting for the robot at least to handle it.
My bit of opinion.

'Ground control to robot...'

'However, it is not possible to 'bypass space/time''
 
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May 11, 2021
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Humans on Mars, or any attempts of colonization of Mars, in the next half century is indeed, not possible. This is due to one main reason. Funding.. Now Elon Musk may have his big steel rocket, but that rocket isnt going anywhere without NASA, and without american taxpayer money, The cost is simply to great. Furthermore, in order for there to be a publically funded NASA\Musk mission to Mars, there has to be a "financial or political incentive" to go to Mars, to justify the cost, and to justify the risk of people dying on Mars. And right now, sadly, there is no reason for America to pay money to send some billionaire yahoo to Mars, we have way too many problems that need to be solved here first, and to be honest, thanks to a certain political party, a functioning America, as we know it now, has one foot in the grave, and within a decade will no longer exist as the "United" States.. So if Musk is serious about going to Mars in his lifeteam, he should be courting the russians or china, because the US is in no shape to deal with this right now. .. Until NASA finds something worth the effort and worth the tax payer money to go to Mars, the Perserverence Robot, would have to find living organisms for there to be any thoughts of sending more than robots to Mars.. So perhaps the moon, and Ceres(asteroid belt) is possible, but anything else is a pipe dream.
One thing is for certain nobody will be going to Mars anytime soon onboard NASA’s current SLS heavy launcher at $1 billion a throw. Starship should be cheaper than this congress dictated program by 1-2 orders of magnitude. In a few years time when Starship is operational the cost of getting to Mars is going to look very different.

NASA has no say over the goals of the US Space program, that’s decided by Congress, NASA has to do what it’s told. And Congress is quite happy to spend tens of billions on space activities every year. Once the price to get to Mars comes down the prestige of sending the first humans there will be irresistible to the critters in Washington, especially if the Russians and the Chinese are strutting their stuff in Space.
 
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Oct 2, 2021
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I think amount of fuel is not the biggest of the problems.

If We can achieve an impressive speed, for example a 40 or 50% of the light speed, having enough energy for a travel, then the main problem will be the small particles in our way. At that speed, It's very difficult to avoid small particles on our way, and a little rock, as small as a lighter, could put an end to our journey, destroying the ship itself.

Regards
 
May 25, 2021
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We are experiencing problems even to go to our own moon. Anywhere else is out of the question. At least for the rest of this century. Covid 19 has damaged even the worlds economy. Not just ours. America can't afford it, Europe can't afford it ,neither can Russia. China, it would be a gamble at best.
 
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Oct 2, 2021
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I think that deep space travel has nothing to do with <<Off topic content removed by moderator>>.

Our sci-fi literature during the past 70 years has been always unrealistically ahead and far beyond our reality today on space travel.
 
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May 25, 2021
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No matter, we still can't afford it. Due to a lot of things other than what I posted. That's just a part of it. A lot of Space ambitions are on hold right now. Both government and private.
 
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May 11, 2021
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No matter, we still can't afford it. Due to a lot of things other than what I posted. That's just a part of it. A lot of Space ambitions are on hold right now. Both government and private.
I think it depends what we are talking about here. If its travel to the stars then the best that can be said is lets have another look at the question in a hundred years time and take it from there. If its sending humans to Mars then the biggest problem is our tendency to throw rockets into the ocean after one use and to let jobs dictate space policy. Nothing wrong with a jobs creation program, but the jobs creation program tail is wagging the space policy dog at the moment.

If Starship delivers on it's promise to reduce costs by 1-2 orders of magnitude, then a crewed mission to Mars should be quite possible even with cut backs. Of course we are still some way from seeing Starship operational and it might not work, but if it does then I would not be betting against Musk. It's also worth considering how much the Government spends on space $20 billion or so - compared to what else it spends - $700 billion or more on defence and all the rest so its not a massive part of the whole.
 

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