How far is a light year?

Question: How far is a light year?


We know that the speed of light is 186,000 miles per second as explained here: How Fast is the Speed of Light?

A light year is defined as how fast light can travel in one year.

Total seconds in a year is 60 seconds x 60 minutes x 24 hours x 365 days = 31,536,000.

31,536,000 seconds x 186,000 miles = about 5,870 billion miles.

Thus, the answer to your question, "How far is a light year?" is about 5,870 billion miles.




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