Traveling at the speed of light for 2,538,000 years you would reach our closest galaxy, Andromeda. To put it simply – moving at 186,000 miles per second for over two and a half million years, covering a distance of 15,000,000,000,000,000,000 miles.
If you happen to be in the northern hemisphere and want to try finding Andromeda – now is the perfect time. Attempting Andromeda within cities or urban areas is futile – Andromeda requires the darkest of darkest skies.
Look to the eastern sky around 9 PM and locate the Great Square of Pegasus. Think of Alpheratz as 3rd base – draw an imaginary line between first and third base – that line points towards Andromeda.