Travel at the speed of light would take a spaceship 80,000 years to reach the center of our Galaxy. At the speed of light squared the same journey would take only 155 days. To reach a solar system 20 light years away would only require 56 minutes. Although these numbers are beyond our scope and technology they are a reality. The true problem is a power plant that could accelerate us to these speeds. Even accelerating at a rate of one C per hour it would take 21.2 years to reach C2. For practicality we must consider not only the time required to accelerate, but to decelerate. If these times are practical then a trip to the center of the Galaxy would take on the order of 40 years. If it were possible to achieve C2 instantly it would take but 155 days to reach the center of our Galaxy.
C = 186,000 miles/second
C2 = 34,596,000,000 miles/second
One light year = 5,865,696,000,000 miles
ltyr/C2= 169.68 seconds /60 = 2.8 minutes
Light
Sun - Earth 93,000,000 miles = 8.33 minutes