Alpha Centauri is a triple star system in the southern constellation of Centaurus. It consists of 3 stars: Rigil Kentaurus, Toliman and Proxima Centauri. Proxima Centauri is also the closest star to the Sun at 4.2465 light-years.
At present technology it would take a ship between 12-18,000 yrs to reach the nearest star. The probability of accelerating a large mass which contains biological units several times the speed of light is near zero. Passing through a worm hole would probably be catastrophic. Not to mention pure fantasy.
It is statistically almost
impossible for there to NOT be other life just in our own galaxy. Luckily, most other forms of life are at a comfortable distance very,
very far away.
Consider, just getting a few peeps to Pluto would take ten years.
No such thing as cosmic visitors, folks.
Jest sayin'