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 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, Mladen Srbinović, Aleksandar Tomašević, Lazar Vozarević, Miodrag B. Protić, Stojan Ćelić and Dragutin Cigarčić. The group has held nine exhibitions, and there were two retrospective in Belgrade in 1969 at the Gallery of the Cultural Center and in 1995 at the Zepter Gallery. After the stabilization of the political and ideological situation in Yugoslavia after 1950. the conditions were created for opening new avenues