Some scientists had the idea to take a small meteorite and create a spaceship from it (add engines to it) Three advantages, you have a lot of energy available, you have a high starting speed and not so much problems with collisions with particles. You have to think out of the box to overcome speed, mass and energy problems, and humans have to be put in hypersleep in special containers, or with special fluid and frozen for a couple of centuries until point of destination is approaching. Before such space ship can travel you need a path through space by putting space beacon-telecopes out, so be sure your path of travel is clear. You have to think about the movie Tron, traveling at light speed inside the cosmos of a computer, you need paths or flight routes in hyper space first.
Again, you accelerate at 1G till you're half way there, then flip around and decelerate at 1G the rest of the way. You use it as artificial gravity. The question is, if you do that, how long will the trip to mars take?
Well, based on Tron and your ideas: Let's first start freezing humans solid, and then bringing them back to life later. If that dosen't work, then try to plug humans into the electrical grid and transform them into pixels.
They'd be dead by the time they got there. At or near the speed of light they'd lose lung and heart function, since both would have to move faster than the speed of light.
This is not true. Approaching the speed of light, it is as if time slows down. This is easy to visualize. Imagine a ping pong ball bouncing back and forth between two paddles. If the paddles begin to move horizontally, it will take longer for the ball to bounce between paddles because it has to cover a greater distance. There are other reasons why they might be dead. Being hit by a speck of space dust would be like being hit by a freight train.
G forces aren't related to how fast something is moving, they're related to the rate at which the speed of something is changing (acceleration or deceleration). The question is, in relation to what? Maybe the interstellar problem can be solved by bending space-time, maybe not. The most famous living physicist seems to think it's possible: http://www.hawking.org.uk/space-and-time-warps.html But solar system travel would be perfectly feasible with technology we can imagine today in terms of propulsion, at least. We have, after all, already sent unmanned probes all over it. Answered multiple times. A couple days. Where in the world did you come up with that number? That's definitely not 1G acceleration. I was assuming minimum distance in my couple days analysis, but even at maximum distance it wouldn't take a week.
Yes. So the follow up question is, if you plan to accelerate at 1G for half the distance to Mars... a) can you carry enough fuel to get you there? b) will the speed attained during acceleration be safe for the craft? c) can you carry (or manufacture on Mars) enough fuel to get you back? If an extended stay on Mars was the plan, I would also consider a gradual progression from 1 "earth G" to 1 "mars G" for the trip there, and vice-versa for the trip back, to help acclimate the astronauts to the gravity conditions.
ion propulsion seems to be the future of space travel in the near term, and we already have the technology
I've found out that a drag car that can go fro 0-160kph in .86 seconds achieves 5.5g if you increase the time elapsed to 1 second than the gs will go down to about 5 5 divided into 160 is 32 so to gain a constant 1 G you have to go 0-32kph in 1 second the distance between mars and earth is constantly changing. the average distance is 225,300,000 km. 32=1 second 32 divided into 225,300,000 km = 7,040,625 seconds-117,343.75 minutes - 1,955.7 hours- 81.5 days or 2.7 months The distance from earth to mars is constantly changing. It can take as little as 1 months when the earth is the closest to mars at 56,000,000km or as far as 401,000,000km Id figure that Id add couple weeks to the original number because of this so thats how I came up with about 3 months and 1 week
at a constant acceleration and deceleration of 1G? actually, how far can a spacecraft travel at such levels, for a year?
look what I found!!!! http://space.stackexchange.com/questions/840/how-fast-will-1g-get-you-there After 1 year at 1 g we will have traveled .5 lightyears and our velocity will be close to maxed out. There after we're moving at close to c, so add a little more than a year for each lightyear distance. so i guess if we cut that in half, to account for deceleration so that we dont crash into a planet, we can travel .25 lightyears at constant 1G acceleration and deceleration. 1 lightyear is 5.8 trillion miles. Mars is 140 million miles away our 1G spacecraft will take us 1.45 trillion miles in one year so, we'll get to Mars very quickly. however, we would probably need to build the ship in space, and take a rocket from Earth to the ship in orbit, and use a rocket to get down to Mars and back to the ship in Mars orbit.
Constant acceleration at 1-G is fine as we experience 1-G here on Earth. It is acceleration of a constant 1.5 to 2-G that would kill a person in a matter of weeks. Imagine hanging upside down with all the blood rushing to your head...how long do you think you could hang like that before dying? Now imagine the same thing except at 2-G. EM Drives could only work as say a vehicle that travels on the ground or hovers or like an aircraft on Earth or other Celestial Body. In deep space EM drives won't work. You really need a Gravitic Drive to make Interstellat Travel viable. AboveAlpha
That TRICK is known as Warping or Folding of Space-Time. Gravitic Drive. Takes Inertia right out of the equasion. No Propulsion. Instead of traveing the distance between two Celestial Bodies you instead FOLD OR WARP the Space-Time between them. Take a sting and pull it tight in both hands. Each end of the string represents a planet in another Solar System. Now move your hands together. Thus no distance between the two points. That is FOLDING SPACE-TIME. Or Warp Drives could be used and YES....sort of the way they are described on STAR TREK. That show was actually fairly advanced for it's time. AboveAlpha
That is theoretically possible, but would require a tremendous amount of energyand there is currently no known source of energy that could even come close to what would be required. This may seem like a bizarre concept, but on a fundamental level, space-time is very much interrelated to energy. The concept of relativity plays a role here. The concept of definite distance, is essentially meaningless. The background vacuum energy (or the fabric of space-time if you prefer) affects the velocity. Remove the energy, and the distance between two points essentially disappears.
I agree, I was just answering the question of "How fast can humans travel in space?", if your on say the earth and the earth is traveling fast, you are too, you just do no know it because of gravity
I thought gravity is just a result of geometry and the Gravity Constant. Folding space-time would require either an obscenely massive object. Or, an extremely small mass (the smaller the better) with the ability to alter the Gravitational Constant. I don't know which way to go. This is all Unified Field Theory Stuff, and I don't know about that.
Early models of Fold or Warping of Space-Time would require a Matter/Antimatter Reaction but the problem is there does not seem to exist enough Antimatter in the Universe nevermind Galaxy to be used in a Matter/Antimatter Reaction. The Multiversal Models are suggesting that a Matter/Antimatter Reaction might infact occur in all similar to the Baseline Universal Model as our own Universal Reality thus creating a CASCADE REACTION in all similar Universal Baseline States enabling the amount of Antimatter to be tiny yet generating a reaction in all Divergent Universal States in our similar baseline reality that we can tap into. This would solve the amount of available Antimatter problem....then of course there is they yet to be proven specific as yet to be discovered Isotopes of Element 115 which is supposed to generate Antimatter. I look at this problem as a UTF issue. Once an Intelligent Enough Race of Beings can both develop and understand a Unified Field Theory or UTF....Interstellar Travel would be simple. AboveAlpha
It's actually 35.3 kph per second squared. The difference from what you observed and what we know is accounted for by friction, which is a much larger force on the ground on Earth than in space. What you calculated is how long it would take at 32 kilometers per second constant velocity, which is a respectable speed of 115,200 kph (escape velocity of earth is 40,320 kph), but not what we're trying to solve. G-forces occur when velocity changes (acceleration), so really it would be gaining 35 kph every second... so after about an hour of 1g acceleration, we would reach the speed you used, and then be going faster after that. Though the speed you use would be much more energy-efficient and, in the short-term, realistic. The speed record for an unmanned probe is 256,129 kph (http://www.popularmechanics.com/technology/g562/worlds-top-12-fastest-vehicles/?slide=1), and manned we still haven't beaten Apollo 10 at 39,896 kph. The most energy efficient would be accelerating to just above escape velocity of earth (barely breaking Apollo 10's record), coasting, and then decelerating to below the escape velocity of Mars or whatever is required to enter orbit. Article that explains some more: http://www.huffingtonpost.com/2013/...t-record-nasa-solar-probe-plus_n_2762918.html
There is some truth to that, but matter and energy are not completely interconvertible. There is something called baryogenisis, scientists are currently not aware of any way to turn matter completely into energy without combining it with its corresponding anti-particles. That is, there is no way to turn just 2 regular protons into pure energy. And it appears there is an imbalance of matter over anti-matter in the universe. So where all this matter came from is a mystery.
Okay, so they generate the energy to represent mass with their antimatter engine. And that's not even taking into account any weird affects like running the mass from all divergent states of reality. Well, why not? They're already taking the antimatter energy from there.
