1 Astronomical Unit = ~8.32 light minutes
Mars is on average about 1.5 AU from the Sun. This means that Mars is approximately 12.45 light minutes away from the Sun.
Light travels 1 AU in about 8 minutes 20 seconds (8.33 minutes). Therefore 8.4 AU takes about 8.4 x 8.33 minutes. That's 69.97 minutes. So, the answer is: about 70 minutes, or an hour and ten minutes.
Ceres is less than 5 AU from the sun, an AU being an Astronomical Unit. The equivalent of one AU is 93.000.000 miles, or 149.668.992 kilometers, so about 465.000.000 miles, or 748.344.960 kilometers!
Oh boy ! (186,282 mi/sec) x (3,600 sec/hr) x (1 AU / 93,000,000 mi) = (186,282 x 3,600 / 93,000,000) (mi - sec - AU / sec - hr - mi) = 7.211 AU/hr (rounded) Now what are you going to do with that number ??
One AU is 148,597,871 km, so 0.7 AU is 104,718,510 km. The velocity of light and other electromagnetic radiations in free space is 299,792.458 km/second, so the time for the round trip is (2 * 104,718,510 / 299,792.458) seconds - or 698.6 seconds (11 minutes, 38.6 seconds.)
They really are not comparable. Light travels 186,000 miles per second, and one AU is about 8.3 light-MINUTES. You can probably do the math, from minutes to hours to days to years as well as I can. Or, you could google "1000 light years in AU" and get the answer
That's about 0.72 AU.
On average Uranus is about 19.2 AU from the Sun, this equates to about 160 light minutes or 2.6 hours
Mars is on average about 1.5 AU from the Sun. This means that Mars is approximately 12.45 light minutes away from the Sun.
A light year is much bigger, an AU is only about 8 light minutes.1 light year = 63,240 AU
Light travels 1 AU in about 8 minutes 20 seconds (8.33 minutes). Therefore 8.4 AU takes about 8.4 x 8.33 minutes. That's 69.97 minutes. So, the answer is: about 70 minutes, or an hour and ten minutes.
1 AU = 0.0000158 light-years
It takes light about 8 minutes to reach Earth, so you could use that or just ask google to get 63239.7263
1 AU is approximately 8 light minutes.
600 light-years is 37,944,646.2 AU
2.25 AU
16 light years is 1,011,834.75 AU (Astronomical Units).