One Light year means what?
Photo Source -By Paul Stansifer, User:84user, ESA, NASA and ESO (and see "source") [GPLv2, GFDL, CC BY-SA 2.5, CC BY 4.0 or Public domain], via Wikimedia Commons
The distance traveled by light in one year is One Light Year.
Distance traveled by light in one second -
299791 miles ie 3 lac miles per second.
Distance between Earth and Moon -
385000 kms
Time required for moon light to reach Earth -
1.3 seconds
Distance between Earth and Sun -
149,597,890 = 15 crore kms
Time required for sunlight to reach Earth -
8 minutes
MISMATCH
As per Hindu Purans - Srimad Bhagvat,
Moon is exactly at half the distance of the Sun.
It is said Sun is at 10000 Yojans from Moon and Moon is at 10000 Yojans from Earth.
However Yojan is very short distance hence
One Yojana is 12-15 Kms
So it means 15000 Kms is Moon
And 30000 Kms is Sun
which does not seem so true.
So perhaps the ancient people were not so good at distance calculations.
Reference - https://en.wikipedia.org/wiki/Yojana
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