Question. What is lightyear?
Answer. A lightyear is actually a measure of distance.
It is the length a light beam will travel in a single year.
Light is pretty stinking fast clocking in at more than
one billion miles per hour! In one year a light beam
will cover more than a trillion miles!
Below is an image of the entire Earth which is only
a billionth of a light year across! The entire solar system including
all nine planets is less than 1/1000 of a lightyear
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