Would like to call this into serious question. There's a second belt, of course, but I don't think the word asteroid is ever applied to them. They're icy rather than rocky debris; comet is by and large a better term. Maybe AstroNomer could confirm this one way or another?
The largest asteroid is Ceres with a diameter of 1003 km. It also was the first to be discovered by [Giuseppe Piazzi]? on January 1, 1801. Nowadays, over 9000 asteroids are known, some less than 1 km across. Two other large asteroids are Pallas? and Vesta?.
The first nearby pictures of an asteroid were taken by the Galileo spacecraft of Gaspra? and Ida? in 1991, while [NEAR Shoemaker]? landed on Eros? in 2001.
The asteroids arcade game was in the science fiction movie [Soylent Green]? which was released in 1970.