Will US go and free the oppressed people of Saudi Arabia now and hung the tyrant ?

That's the true American way !!! Humans that act this way will soon or later be killed by the others if they are not clever enough to do it without everybody seeing it as the lions do. There always be people that do it and there always be killed for that if caught that's the way the humans work. And I'm guessing if by some reason those that kill humans for their share increase over some critical mass that society will just die in hunger. Not a bright forecast for the US future ;)

Waste energy You will. But plenty of energy You have ;) . You seemed to mindfully jump over my question "How do you decelerate the solar sail when You reach your destination". And I'm not speaking about some fictional 'other solar system' but inside our own. I really wander which mindless drones voted your comment +5 and would they want to strap them to a solar sail and let them fly to the 'next solar system' to decelerate ;)

Limited they are not. There is so much reaction mass in the solar system. Have You notice there are 8 planets plus planetoids plus hundreds of moons and asteroids ? Yea reaction mass could be even the moon dust. and You need just enough to accelerate and decelerate to say Mars. BTW how to You decelerate with solar sails ? You bring them down and wait for water friction to slow you ? Oh wait no water, but hey the cosmic particles and radiation might slow you , eventually, after few thousand years, may be, if you are lucky. Of course you can try to pull the atmospheric breaks , but with solar sails and humans on board , better be You than me. And try to atmospheric break on a moon or asteroid. I wish You luck ;)

Go to the NASA site and check the size of a sail needed to move a single manned craft. Then what was the formula - twice the distance 4 times less power ? Solar sail can be used on some small craft on an out of solar system mission which would last 100+ years. But for a human space flight or larger craft they are a joke. If you want to reasonably accelerate something bigger than a Kinder Surprise toy You will need a sail half the earth size (keep in mind that a highly scientific calculation so don't argue about it ;) ). And when You get to Mars in 2 days guess where You'll get your reaction mass - too hard for You huh ? How long will it take even on ginormous solar sail ? My guess is when astronauts grand children will be in college if they leave in their 20ies ;)

Screw the solar. It's such a massive fragile structure and it has so low acceleration and minuscule force so it can only push/pull a small/light vessels. Why not test nuclear engines ? Are we so afraid of little nuclear radiation that will probably be undetectable because the earth is bombarded with so much radiation already ? The cold war is (kind of) over. We should stop fearing the *NucleaRrRr* (I just shit my pants) power and start using it to really take off our space programs. Chemical power is a joke. It's a proof of concept overused. Solar sails are of very limited use at most.

It's a very very interesting and relevant question (at least if I and the OP got the things right). The Big Bang theory says that in the beginning the space started to expand much faster than the speed of light (and they explain that by saying that space expansion is not constrained by the c) which explained some anomalies astronomers are seeing. Now if the gravity works by pulling the space to the center of the mass it should mean that the manifestation of that pull is not constrained by c. So the gravity should not be limited by c either. I'm not a scientist, it's just what I read around internet and saw on discovery. So a professional opinion on this would really be appreciated.

I'm sure he was joking ;)

Nobody uses MSN where I live. Most of the people never heard of it. Everybody uses Skype (kids, moms, grand moms), few use ICQ (mostly older guys - 30+ years old) and some google's chat (techie guys).

I was joking - mostly :) . And we don't use or have a word 'soccer'. It's Football and the other weird handball thing is called american 'football' ;)

There is not such thing as 'american football'. It is some kind of weird handball with armored players trying to smash each others heads. And THERE IS NO BALL (other than their heads which might explain the head banging ?!). There is some kind of lemon shaped thingy that they chase around and I could only guess that they call it 'ball' because that much of head bumping will seriously distort one's sight and the lemon might start to look like a ball. Of course I'm not sure why that spectators call it foot ball as the players (more like crowd control police ..) almost never use their feet to play (excluding running) and there is no ball. It's kind of a mystery ;)

Will there be a good PvP system implemented ? I get bored really fast with PvU(niversity) grinding :P

But he is actually right ...