when i'm playing a web based game and flashback of an anime that i've watched before not long ago.

but then, something came in my mind, combine with the other information that i've get from other sources, including TV, books and other...

here is some problem.
1. human health problem, we cant live in space for a long time without the presence of gravity, our muscle will start to swell, until now, astronauts only can stay in ISS for half a year and they have to went back to earth, they have to do exercise regularly while in space to keep their muscle working and prevent swelling, this is what i heard from discovery channel some time ago

2. so we might need the presence of gravity in order to survive, so how do we get gravity in a colony ship? artificial gravity?

3. plants and organism need sunlight, when we were in deep space, how do we get sunlight?

4. oxygen, water, temperature, and food, without sunlight there will be no plants, even if there is, the plant will withered or very weak due to lack of sunlights, the water will surely run out no matter how we save it and recycled it.

5. political, racism, and religious issues, i doubt we will have a peaceful life in the colony ship, unless every human beings has the same mindset.

6. death rate, birth rate and education, how can we control the death rate and birth rate? and every adults and children need education, we need a totally new and unify education, but how can we unite people with different believe and mindset?

the fastest way to travel from A to B in space is by wormhole, with wormhole, you can travel from earth to the other planet far way in just a very short time without reaching the speed of light.

the another method is by our conventional propulsion drive, or maybe some more advance propulsion drive like the impulse drive in star trek?

furthermore, i dont think we are able to travel faster than light, imagine you are cruising at a speed faster than light where you overtake the speed of light, no light can reach you, what can you see?

make sense?

hibernate? so you are going to say that everyone will be in hibernate mode during the whole journey?

then 1 question arise, how do we communicate?

if we use laser, which is at the speed of light, it would take million of years just to send a message