If light travels at 186,000 miles per hour and a star is 4.3 light years away how long would it take for the light from the star to reach us. And how long would it take for a flight to it?
Sending a person to Alpha Centauri within a human lifetime wouldn't be easy. Alpha Centauri is 4.37 light-years away ? more than 25.6 trillion miles, or more than 276,000 times the distance from the Earth to the sun.
