How was the light year discovered?
This was done by a Danfish astronomer named Olaus Roemer in 1676.He noticed that the eclipses of one of the moons of Jupiter Kept coming later and later as the earth moved in its orbit to the opposite side of the sun from that occupied by eclipses came on schedule again’ The difference in time added up to nearly 17 minutes. This could mean only that it takes that length of time for light to travel the diameter of the earth’orbit.This distance was known to be nearly 186000000miles.Siiiince it took light about 10000 seconds [nearly 17 minutes] to go this distance, it meant that the speed of light is about 186000 miles/seconds.
Wednesday, February 20, 2008
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