Mimas ("MY mas") is the seventh of Saturn 's known satellites: orbit : 185,520 km from Saturn diameter : 392 km mass : 3.80e19 kg The pronunciation "MEE mas" is also acceptable. ... The surface of Mimas is dominated by an impact crater 130 km across, known as Herschel ; it's almost 1/3 of the diameter of the entire moon. ... The impact that made this crater must have nearly disrupted Mimas. ... How big a hit can a planet or moon take before being completely disrupted? Saturn .. ...

... 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 > . ...

. I was organizing my images today and came across one 1998S taken on the evening of Apr.5,98 (Cookbook245 on 8 inch. SCT, stacked 3 x 4 min. (unfiltered)). This jpg image covers approx. 60% of the original field of view. Hope you like it! . Jan Wisniewski, jwisn@netcom.ca . Back to Supernovae in NGC and IC galaxies . Back to Supernova 1998S images . David Bishop Last modified: Tue Oct 6 12:11:18 EDT 1998

... 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. ...

... 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 . ...

... Сайты о планете Марс . ... Так, "марсианские" сайты занимают почти половину всех планетных линков на Yahoo - http://dir.yahoo.com/Science/Astronomy/Solar_System/Planets/Mars/ Существует веб-ринг сайтов, посвященный Марсу - http://www.iag.net/~crs/mars/ring.htm ; есть сайты не только с подборками линков о Марсе, но и чатами на марсианские темы - http://www.iag.net/~crs/mars/ , кое-где вы сможете поучаствовать и в обсуждениях проектов колонизации и освоения Марса - http://library.thinkquest.org/19455/...

... The distance scales of the objects are matched both by comparing the first derivatives of the angular velocity determined separately from radial velocities and proper motions and by the statistical-parallax method. ... Good agreement between the inferred 0 and our calculations based on space velocities suggests that the Lindblad relation holds throughout the entire sample volume. ... Brandt and Blitz (1993) published the distances and radial velocities for a total of 206 H II-regions. ... Astron. ...