What if we invented a machine that conducted light to go as fast as light years?

<What if we invented a machine that conducted light to go as fast as light years?> I don't know what you mean by 'conducted'. Light year is a term of distance, not speed. It is impossible to build a machine powered by light that could go the speed of light, or anywhere close to it, if that's what you're asking.

<So I was looking at [Earth's] twin (Kelpter-186).> It's not Kelpter, it's Kepler, and Kepler-186 is a star, not a planet. Kepler-186f. Nor is it Earth's twin, there are many differences, it is *similar* to Earth insofar it is in the habitable zone of Kepler-186 and only a little bit larger, but beyond that the similarities end. And "several light years" turns out to be 490.

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<What if we made a spaceship that somehow produced light (Like man made light, not going off the sun like a solar sail) And that light would be used to push the people along.> It wouldn't work. What you're describing *is* a solar sail, irregardless of where the light comes from, but your idea is the equivalent of putting a large sail on a car to propel it, and a huge fan on the back of the car to push the sail. If you don't see why that wouldn't work you need to learn more science. In short, perpetual motion machines don't work.

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<What about my "Hypothesis" Would need to be changed?> It's good you put hypothesis in quotes, because it's not one. What would need to be changed? Just about everything, I'm afraid.

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<In case you haven't noticed, I really don't have no idea what I'm talking about,> Yes, we noticed :) If you're hoping to write science fiction, don't. There are few things worse than someone making up science as they go and getting it wrong. You did good to come here and ask, though, and to your credit not doing it anonymously. That speaks to your good character. And it's far more interesting to see this kind of question than the 91,055th "Why is the sky blue" repetitive drone so often seen from newbies here. You'll come away from this knowing a lot more than you did before, and that's always a good thing.

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Maybe as a science fiction device carefully avoiding details, but there is no way it would work practically - light has very little force per square meter which is why sails on spacecraft are shown very large. There is no way to build a huge wide light source.

The ion engines that accelerate particles at a very high velocity are the closest to your idea and you need to study them more.

It sounds like you're talking about a spaceship that shoots light out its back end, causing the ship to accelerate forward.

This is theoretically possible, because light DOES carry momentum. Even when you shine a flashlight, the light produces a very, very tiny "recoil" action against your hand (much too small for you to feel).

But it takes energy to produce light, so you're going to need an on-board energy source. And even then, it is very, very inefficient. If you use light to provide your thrust, then you need some energy source that produces power at this rate:

power = thrust × c

where "c" is the speed of light. So for example, to produce 1 ton of thrust from pure light, you would need to generate this much power:

power = (1 ton) × c = 2.6×10^12 Watts, or 2.6 billion kilowatts

In contrast, if you produce your thrust by throwing mass out the back end, you need only this much power:

power = thrust × ½v

where "v" is the exhaust speed. (The missing "½" in the "light thrust" equation has to do with the theory of relativity.) So for example, if you used an ion drive with an exhaust speed of 20 km/sec, you would need to generate "only" this much power to generate a ton of force:

power = (1 ton)× ½(20 km/s) = 88,000 kilowatts.

But no matter what propulsion system you use, you are going to run up against the "universal speed limit", which is "c" (the speed of light). You can't cross that barrier no matter how much power you use, or how much thrust you produce. The reason for this has to do with the nature of space and time, and their relationship to motion and energy and momentum, which we learned from Einstein.

Kepler 186f is 500 light years away. That means the ABSOLUTE MINIMUM time it will take to get there, is 500 years (although the time on board ship can seem considerably shorter, also due to the theory of relativity).

But having said that: There are hypothetical ways of "cheating" the speed limit. You cannot travel "through" space faster than "c"; but if you find a way to "drag" space along with you, it MIGHT be possible to get from point "A" to "B" in a shorter time period. Google "Alcubierre Drive".

What do you mean by "to go as fast as light years"?

Light Years is not a measure of speed. Sort out your c o c k eyed ideas by learning Physics.