Meteor shower particles that are quickly blown away by solar radiation pressure). Recently, Peter Jenniskens has argued that most of our short-period meteor showers are not from the normal water vapor drag of active comets, but the product of infrequent disintegrations, when large chunks break off a mostly dormant comet. Examples are the Quadrantids and Geminids, which originated from a breakup of asteroid-looking objects, 2003 EH1 and 3200 Phaethon, respectively, about 500 and 1000 years ago. The fragments tend to fall apart quickly into dust, sand, and pebbles, and spread out along the orbit of the comet to form a dense meteoroid
The December Group evolution of contemporary representational paintings in the trends of form. It should be noted that close understanding within this group of artists is their tendency to form geometrization, that became leading aesthetic characteristics of this period. After the dissolution of the group its members continued on their separate ways to mould picture of modern Serbian art in the second half of the 20th century. The December Group The December Group (, "Decembarska grupa") was a Serbian artistic group founded in Belgrade in 1955. It ceased to exist in 1960. Group members were: Zoran Petrović, Miloš Bajić, Aleksandar Luković, Lazar Vujaklija,