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Light travels at 186,000 miles per SECOND. There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 365.24 days per year. You want 20 light years? Multiply all those numbers together, and then divide by your speed to get years. It will be a VERY large number!
What else can I help you with?
How long would it take for light to travel 14 billion light years?
14 Billion years
How long would it take to travel 39 light years?
Traveling 39 light years would take 39 years at the speed of light.
How long would it take to travel 40 light years?
Traveling 40 light years would take 40 years at the speed of light.
How long does it take light to travel a distance of 2700 light years?
Well, it takes 2,700 years for light to travel that far. Anything travelling at half light-speed would take 5,400 years. At 1/4 light-speed, it would take 10,800 years.
How long would it take to travel at the speed of light from Earth to Aldebaran?
It would take approximately 65 years to travel at the speed of light from Earth to Aldebaran, which is about 65 light-years away. However, currently, we do not have the technology to travel at the speed of light.
Why is light you see from stars several years old?
it takes light long to travel so you see it late
How long would it take to travel 4 000 light years?
Like any distance, it depends on how fast you are going. At the speed of light it would take 4,000 years to travel that distance.
How long does it take light to travel across the Milky Way?
It take the light to travel for 2 million years Actually about 100 years, maybe less.
How long would it take for a signal to travel from Earth to a star located 100 light years away?
It would take 100 years for a signal to travel from Earth to a star located 100 light years away.
How long would it take to travel to alpha centauri going at the speed of light?
Approximately 4.3 years. The distance is 4.3 light-years; a light-year is the distance you can travel in a year, at the speed of light. Please note that current technology doesn't allow us to travel anywhere near the speed of light.
How long would it take a human to travel in earth time 600 light years?
300 billlion years
How can we know how some parts of the universe looked a million years ago?
Light takes time to travel, so light reaching us from a million light years away has taken that long to travel to us. We see what it looked like when the light left.
