This depends on where you are going and the terrain.
Horses can manage a comfortable pace of about 20 to 30 miles per day, walking at 3 to 4 miles per hour. Horses with great stamina can trot at 10 mph for up to a half hour, or run at top speed (about 30 mph) for short distances.
2 hours
around 4 hours
About 8 and a half days
about 5 days
45 days
13.3 days.
Many days, if you are walking.
It depends on where you live.
100 billion
The sun cannot travel around itself.
16,000 days if you were an idiot
It goes round once in 687 days.