... 2009 November 7 . Stickney Crater . Credit: HiRISE , MRO , LPL (U. Arizona) , NASA . Explanation: Stickney Crater, the largest crater on the martian moon Phobos, is named for Chloe Angeline Stickney Hall, mathematician and wife of astronomer Asaph Hall. ... Even though the surface gravity of asteroid-like Phobos is less than 1/1000th Earth's gravity, streaks suggest loose material has slid down inside the crater walls over time. ... About APOD | ... A service of: ASD at NASA / GSFC . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. April 30, 1999 . Solar Shock Wave . Credit: Barry Reynolds (Perth, Australia) and the SOHO - EIT Consortium . ... On planet Earth, observer Barry Reynolds photographed the expanding shock front (left) in the light emitted by hydrogen atoms at the solar surface. ... About APOD > . ...

Supernova 1987A in LMC . One day in 1987, an astronomer by the name of Ian Shelton was making observations of the Tarantula Nebula in Large Magellanic cloud at Las Campanas Observatory, and he noticed something strange on his image. ... SN 1987A got as bright as 2.7, the only other recent SN even to come close was 1885A in M31 which got up to mag 6. ... Mag 4.5 . ... IAUC 4318 2/25/87 Type II? ... IAUC 7354 2/1/00 New structure in the inner ring . ... IAUC 7360 2/7/00 HST observation of new spot . ...

... ИНФОРМАЦИЯ О МЕРОПРИЯТИЯХ МЕЖДУНАРОДНОГО ГОДА АСТРОНОМИИ. КОНФЕРЕНЦИИ И ШКОЛЫ 2009 года. Резолюция Всероссийской конференции «Астрономия и общество», посвященной Международному году астрономии(Москва, МГУ им. М.В.Ломоносова, 25–27 марта 2009 г.). Международная конференция: “ASTRONOMY AND WORLD HERITAGE: ACROSS TIME AND CONTINENTS” («Астрономия и всемирное наследие: через время и континенты») 19 – 24 августа 2009 года Россия, Казань . ...

... Отмеченная наградами АстроТоп-а . ... 1) К участию в конкурсе допускаются все российские сайты на тему астрономии и космонавтики, и все русскоязычные сайты за пределами России. ... II) Сайт года . ... Победитель: Астронет - http://www.astronet.ru/ : подано голосов экспертов - 109 (всего - 129) . ... 3-е место разделили: Астрономия и Телескопостроение - http://www.astronomer.ru/ и Лента новостей космонавтики от Железнякова - http://www.cosmoworld.ru/spaceencyclopedia/hotnews/ : подано по 37 голосов; ...

... Here is a brief outline of the current theory of the events in the early history of the solar system: . A cloud of interstellar gas and/or dust (the "solar nebula") is disturbed and collapses under its own gravity. ... The gas cools off enough for the metal, rock and (far enough from the forming star) ice to condense out into tiny particles. (i.e. some of the gas turns back into dust). ... Once the larger of these particles get big enough to have a nontrivial gravity, their growth accelerates. ...