in any case it s clear a light year is a vast expanse over a year light travels 5 87849981 x 10 12 miles roughly 9 4605284 x 10 12 kilometers written out that s 5878499810000 miles or 9460528400000 kilometers
Earlier racing had used carts. In its final form it is little more than a U-shaped shaft mounted on two wheels with a seat at the end of the U. When it was introduced in harness racing early in the 19th century it weighed about 125 lb (56 kg), but by the 1870s it had been reduced to 46 lb (21 kg).
Sulky, originally a light, open, one-horse, four-wheeled vehicle with its single seat for only one person fixed on its shafts. It is thought to have been invented in the early 19th century by an English physician and was supposedly named for his sulkiness in wishing to sit alone.