Question

If Uranus is 1,607,000,000 miles from earth how long would it take to get there?

Answer 1

At least `2.4` hours (as perceived by an external observer)

Explanation:

The speed of light (in a vacuum) is exactly `299792458` metres per second (by definition)

There are exactly `1609.344` metres in each mile.

So the fastest possible time to travel from the Earth to Uranus is:

`(1607000000*1609.344)/299792458 ~~ 8627` seconds

or about `2.4` hours.

If you were travelling at near the speed of light, then the time you would experience would be less than `2.4` hours due to relativistic effects.