well the speed of light is roughly 186000 miles/second so you would be about 22766400000 miles away
The time would be T= d/c where d is the distance between Earth and Neptune and c is the speed of light.
I would imagine the speed of Electricity in a bolt of lightening is very close to that of light ... light travels at 187000 mph...The moon is 238,857 miles from earth. If you divide the speed of light from the distance to the moon, you get about 1.27 hours (1 hour, 16 minutes, and 20 seconds
It would take 65 years 11 months to travel to Aldebaran from Earth traversing at the speed of light.
15 hours
As earth revolves around the sun at a much faster speed than Jupiter does, the distance is changing a lot from year to year, even every minute. If say starting from the sun, even at the speed of light, it would take approx 43 minutes to get to Jupiter. If the rocket managed an approximate of 1/100 of the speed of light, then the trip would take roughly 3 days or approx 72 hours. With this speed, from earth, when earth is aligned with Jupiter on the right side of the sun, the trip would roughly be done in 63 hours. (Approx 2 days and 15 hours). Rockets today can not achieve this speed, but who knows what future holds for us.
8 hours
Distance can't be measured in time units unless we know the speed. At the speed of light, the Sun is about 8 1/3 light minutes from Earth. At US interstate highway speed, it's a very long time indeed (at 100 kilometers per hour, it would take you over 170 years to get there).
3 days
About 1.5 seconds
You could do, but it would not be very useful. Earth is about 8 light minutes away from the Sun, and Pluto is about 40 light hours from the sun - that is, if you could travel at the speed of light, it would take you 40 hours to get from Pluto to the sun. Which is not very far in terms of the galaxy.Plain old millions-of-kilometers would to the job, otherwise an Astronomical Unit or AU (the average distance of the Earth from the Sun) would make more sense.
At or very near the surface it would take almost 34 hours.
Top Cheetah speed = 75 mph. Circumference of the earth at the Equator = 24,901.55 miles. Time to circle the earth = 332 hours (13 days and 20 hours).