Questions tagged [alpha-centauri]

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1answer
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Has Alpha Centauri been a subject for SETI activities?

There is a claim that habitable-zone orbits are stable around both components of the Alpha Centauri binary, and at least one planet has been detected (though not in the habitable zone). Both stars ...
4
votes
3answers
1k views

How long could it take us to reach Alpha Centauri with current technology?

I was searching somewhere on how far away the nearest star system was and what that system was. Am I correct in that it is Alpha Centauri at roughly 4.75ish lightyears? If so, a probe or ship or ...
2
votes
3answers
1k views

How close humans are for interstellar travel? [duplicate]

I have heard many times about interstellar travels. Are centrifuge space craft (artificial gravity) and warp drives technologies being built or still it is just concepts ? Nearest start system is ...
1
vote
1answer
135 views

Can light sails be stopped (after 20 years)? What will happen after the 20 years (after their journey)?

At that time will they be destroyed? Or can they come back? Or will we simply cut the laser power? And if we can make the size of the craft big enough so that a person can be on-board (without ...