It's Space Day, but traveling the vast entity that is space would take far longer than a single day.
It's big out there! And, based on our current level of technology, here's about how long it would us take to reach:
The moon: 1-3 days
Mars: 150-300 days
The "end" of our solar system: 40 years
The nearest star: 80,000 years
The nearest galaxy: 749,000,000 (that's 749 million) years.
The end of the known universe: 225,000,000,000,000 years (that's 225 trillion) years.
Sources: Universe Today, NASA, Phil Plait, Slate