Light travels approximately 982,080,000 ft/s, and one year has approximately 32,000,000 seconds. a light year is the distance light travels in one year. calculate the distance of one light year in feet. 3.1 x 1016 ft 3.1 x 101 ft 3.1427 x 1016 ft 3.0690 x 101 ft

DISTANCE = TIME X SPEED = 32,000,000x982,080,000 = 3.1427X10^16 ft. 

just use a calculator and multiply the 2 values given ... it will give u 31427500000000000 which is 3.1247 x 10^16 hope this will help u :)

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.