Human size in the galaxy

[Gnjus]

With Turks living on this earth just what other form of extra-terrestrial life form do you guys need ???

[Prpavi]

Interesting reads all, but why would you think if a really advanced race exists and they have the ability to find and reach us (inside the same galaxy or from another one doesn't matter) they could even communicate with us?

how? by speech? im sure they would be way beyond that and telepathy would just blow our little minds.

we would be like snails, most of them don't even notice a human passing by since we move way too fast for them and if you "kidnap" one snail infront of another if he had the conciousness to precieve his friend missing he wouldn't be able to see the act of kidnapping. if there are aliens among us i believe they would move freely without us even noticing. there are more dimensions than we can see feel and move in.

i think the reason we heaven't made first contact (if there are aliens in and around our planet) is that our brains are just not ready yet and there are no common means of communication atm. that may be the reason why allot of people think were alone, currently yes, in a millenium..? who knows.

[Teeth]

I'd say any alien beings would be bound by the same natural and biologic laws as we are.

[Prpavi]

but i digress....

my initial question was more about humanoid type aliens of common size not oversized or ant like, a scenario from most SF shows and movies where everybody is not that incredibly different.

so u think there could be the ones that resemble us or they would all be so different there would be no way of us making any kind of contact/interaction/relationship

[Prpavi]

I'd say any alien beings would be bound by the same natural and biologic laws as we are.

u answered my question before i asked it. Alien! 

[Lt_Anders]

It is mathematically impossible to travel at or near the speed of light.

Using the famous equation: E=MC^2. To travel at the speed of light(C) you have to either have INFINITE MASS or UNLIMITED ENERGY.
But....
That doesn't mean that you can't travel "at FTL" via things like Wormholes, or Subspace dimensions. But via direct, put engines on ship and fly at light speed, it won't happen.

As for population, depending on a multitude of factors, large population races would self correct themselves. As a nation expands, it'll suffer instrife, unless it's a hive mind.

[Kafein]

I'd say this would come with enough problems itself to never be realistic, and we would still have to multiply our current speeds by a redonkeylous amount for even that to become feasible. I don't think there are many practical uses either to having a human colony at a few decades travel distance.

In space, reaching crazy speeds isn't a very big problem if you have enough fuel. There are things to slow you down of course, but nothing much more heavy than cigarette smoke. On top of that, the ship could be designed like a very long and very thin tube to minimize the contact surface.

If they got oil

On a large timescale, oil won't matter at all, at least not when it comes to energy. We currently sit on millenias of fuel for high speed nuclear power plants (that are kinda off-limits right now because the produced plutonium is what you use in atom bombs), and I didn't mention thorium. By the time we seriously think about interstellar travel, we will also control fusion if it is at all possible. Oil is not the only llimited supply resource of course but I don't think that kind of problem is going to be as common in the future as it is today.

[Vovka]

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[Molly]

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[Henry_Broodsonson]

All in such a huryy

[Teeth]

In space, reaching crazy speeds isn't a very big problem if you have enough fuel. There are things to slow you down of course, but nothing much more heavy than cigarette smoke. On top of that, the ship could be designed like a very long and very thin tube to minimize the contact surface.

Well, I am not sure how interstellar space travel works compared to space travel in our solar system. But I think you are always influenced by the gravity of something and are never able to just fly in a straight line and accelerate to great speeds.

Regardless, an interesting mission to Jupiter's moons is estimated to take 8 years to arrive and Jupiter is about 800 million km away, or 0.00008 lightyears and the closest System is 4.24 lightyears. This 53000 times further away than something that takes 8 years to get to. Hence my statement that we need to multiply our current speeds by a redonkeylous amount. I think reaching crazy speeds surely is a big problem because carrying lots of fuel is a problem.

[Molly]

In theory, everything affects everything.
Physics state that the Statue of Liberty in New York has a gravity field that affects the butterfly in front of your window or your fingernail. The same applies "everywhere". Very abstract and thin but overall still valid...

[Lt_Anders]

Solar sails! Because i'm certain other people skimmed my previous post cos it was a wall of text explaining the principle, in essence you use photons from the sun/any star as endless acceleration to lightspeed.

Heh, Perhaps, but we don't have much, if any, concrete data on space. Thus we only have the mathematical stuff that's been developed thus far.

Most physicists don't believe in "true FTL" but they do believe wormhole or subspace type FTL is possible, though our understanding is still, very limited. For the beginning of space travel, we will most likely be using simple Combustion/Fission based travel systems until we either discover ways to make Fusion, or we discover new properties of the universe.

And einstiens equation was to  prove that Light speed(C) was the "Speed limit" in space, or in other words, nothing can go faster, and things, such as gravity, happen at near lightspeed.(Such as if the sun winked out, Earth wouldn't just start randomly flying away, we'd be in our orbit for 8 minutes until the last ray of sunlight hit before we went out of whack.)

[Ninja_Khorin]

SHOL'VA KREE!

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Silence, inferior beings.

Shak'ti'qua

Your manners in the presence of a God are unspeakable. Slaves is what you are. Slaves of the mighty Goa'Uld. Ya wan, ya daru.

You need not know what lies beyond the rancid hole you are to spend your whole life in, mining Naquadah, slaving for your God. The alphas of your race will serve as vessels for the Goa'Uld and consider that an honor.

*whip*

*raises one eyebrow* Indeed.

[Kafein]

Well, I am not sure how interstellar space travel works compared to space travel in our solar system. But I think you are always influenced by the gravity of something and are never able to just fly in a straight line and accelerate to great speeds.

Regardless, an interesting mission to Jupiter's moons is estimated to take 8 years to arrive and Jupiter is about 800 million km away, or 0.00008 lightyears and the closest System is 4.24 lightyears. This 53000 times further away than something that takes 8 years to get to. Hence my statement that we need to multiply our current speeds by a redonkeylous amount. I think reaching crazy speeds surely is a big problem because carrying lots of fuel is a problem.

That kind of reasoning only works if you consider extremly short distances (aka not letting the spaceship reach decent speed) in space filled with a lot of stuff that creates friction and attraction. Once you're out of a solar system, there's almost nothing to slow you down, which means building up your speed and keeping it requires very little energy.