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).
Two-wheeled, three-wheeled and four-wheeled scooters which appeared around 2000. A kick scooter, push scooter or scooter is a human-powered land vehicle with a handlebar, deck and wheels that is propelled by a rider pushing off the ground. The most common scooters today have two hard small wheels, are made primarily of aluminium and fold for convenience.