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How long would it take to go one light year using the fastest vehicle known to man?
Wiki User
∙ 14y ago
One light year is about 5,878,630,000,000 miles. The record for the fastest spacecraft of all is held by the twin Helios spacecraft that were placed in orbit around the Sun. Both these vehicles reached top speeds of around 150,000 mph at closest approach to the Sun in their highly elliptical orbits,. Let's round the lightyear distance to 5.9 trillion miles. 5,900,000,000,000 / 150000 = 393333333333.3 hours. there are 8760 hours in a year so it's about 44.9 thousand years transit time... Not a local hop.
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There is an error in your calculations somewhere.
1 lightyear = 5,879,000,000,000 miles.
Divide that by 150,000 mph and one gets: 39,193,333 hours.
Divide that by 24 hrs/day and 365 days/year and one ends up with only about 4,474 years... Heck, that is only twice the time from the birth of Christ to today... just a little more than a weekend jaunt.
Another way of calculating the speed is to take the speed of light, 299,792,458 m/s, convert to km/hr by multiplying by 3600 s/hr and dividing by 1000 m/km to get: 1,079,252,849 km/hr. Divide this by the probes speed: 252,792 km/h
1,079,252,849 km/hr / 252,792 km/h = 4,269.
So, the probe is traveling at 1/4269 the speed of light.
Since the probe is traveling at 1/4269 the speed of light, it would take the probe about 4269 years to go the same distance it would take light to travel in 1 year. The difference between this and the number above of course is due to rounding errors and approximations.
Proxima Centauri is the nearest star which is 4.2421 light years away. It would only take us about 18,110 years to get to Proxima Centauri at this speed.
Note, the speed was only obtained on the fastest approach towards the sun. However, the probe would not have been able to accelerate to that speed on a path out of the solar system.
Wiki User
∙ 14y ago
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