It would all depend on the speed travelling, as time = distance/speed.
Traveling at the speed of light, it would take a spacecraft 40 years to reach a star located 40 lightyears away from Earth.
over 9000 lightyears away
2 lightyears
A light year is a unit of space, not time. It is the distance light travels in a year. Eris is far less than a light year away.
It will take 200 years to reach the planet kepler from Earth because it is 200 lightyears away. (On the other hand, if you travel at a more leisurely 10 million miles per hour, you'll have to set aside a little over 13,000 years for that trip.)
If you mean "How long does it take for light from Schedar to reach Earth?", then just use the formula: Distance equals speed times time, or more easily look up the distance in terms of lightyears. Wikipedia gives Schedar as being 228 LY's away...or it will take 228 years for the light to reach Earth.
1 hour
1 mile unless you go the long route voa heaven and the it is 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 lightyears away
At a speed of 1,516 miles per hour, it will take you 1,902,141 years to travel 4.3 light-years.
Easy answer: it would take 72 years.
It would take 100 Earth years for a signal to travel from a star located 100 light years away to reach Earth.
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