Can we travel to any other galaxy?
We have not even traveled to another planet in Solar system..Man have only reached Moon the satellite of earth .With present technology it is impossible.to go to another galaxy.
Our milky way galaxy alone stretch about 100,000 light years..Nearest Galaxy Andromeda. is about 2.5 million light years away.
Eevn if we travel at speed of light it will take 2.5 million years to reach there.Maximum man made probes traveled is about 23 kilometers/second.Speed of light is 300,000 kilometers per second.
If we could construct a spacecraft that generates
Though a trip to the Andromeda galaxy would be limited by the speed of light, the time experienced by the traveller would be shorter due to the time dilation effects of special relativity.
For example, if a ship that provides
From the perspective of an observer on Earth the journey would take
A suitable power source to sustain
Such a journey would probably be of little practical use to those who remain behind.
Beyond these considerations, what about faster-than-light (FTL) travel?
Possible mechanisms for FTL travel are troublesome due to violations of causality according to our current understanding of physics. How about travelling through some kind of wormhole or suchlike? The theoretical models for wormholes which have been constructed so far tend to collapse when there's some whiff of the possibility of information travelling faster than light.