If we develop spacecraft that can take humans to nearby solar systems at a few percent of the speed of light,
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If we develop spacecraft that can take humans to nearby solar systems at a few percent of the speed of light,

[From: ] [author: ] [Date: 11-10-09] [Hit: ]
milky way is abut 100,000 lydiameter and contains some billions of stars ( maybe trillions.now estimate population growth but remember it is exponential,also the human species is only about 1/2 million years old,once separated we would evolve totally different characteristics and not be the same species on each star system.the Universe is about 12 billion years old and the sun about 5 billion.......
1. a few million years
2. a few hundred thousand years
3. a few hundreds of millions of years
4. we could never colonize the galaxy unless we have ships that could travel very close to the speed of light

which one is the correct one?

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make some reasonable estimates

nearest star is 4 light years away, milky way is abut 100,000 ly diameter and contains some billions of stars ( maybe trillions. look it up) assume average star distance of say 10 L-Y
and at 5% C that is 200 year for one way trip

now estimate population growth but remember it is exponential, the more people and stars populated the faster population and travel increases

also the human species is only about 1/2 million years old, typical species last in the tens of millions of years

once separated we would evolve totally different characteristics and not be the same species on each star system.

the Universe is about 12 billion years old and the sun about 5 billion. life on earth less than 1 billion

so billions of years is too long, thousands too short.

I would guess SWAG ( scientific wild *** guess) we will colonize mars in 100years. send out star ships ( generation ships, one way trip ) in 500 years and be true space farers with C drive in less than 2000 years ( the time since JC was crucified)

Or we may blow ourselves back into the stone age in less than 100 years. that would be most likely.

there is a huge debate : is it possible to be an intelligent tool making aggressive species and NOT kill ourselves

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Part of the question is missing. If the missing phrase is "how long would it take to colonise the galaxy", then it depends on your definitions of what it means to colonise the galaxy. How many planets, or how far away, means "colonised"?
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