... 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. ...

My colleagues and I have recently completed a series of observations of SN1999an. ... The telescope is located at Martin Observatory in Blacksburg, VA, and is operated by the Physics Department of Virginia Tech. Our IAU Minor Planet Center Observatory Code is 841. ... Attached you will find a copy of one of our images (in .jpg format) with the supernova indicated. ... Virginia Tech Department of Physics . Back to Bright Supernovae . Back to Supernova 1999an . ...

11pt \topmargin 0pt \renewcommand{\textfraction}{0.05} \renewcommand{\topfraction}{0.95} \renewcommand{\bottomfraction}{0.95} \ newcommand {\mylabel}[2]{ \ noindent \ begin {minipage}[t]{185pt} \fontsize{6}{7pt}\selectfont {$Astronomical\; and\; Astrophysical\; Transactions$,} 2000, Vol.~#1, pp.~\thepage{}--#2 Reprints available directly from the publisher Photocopying permitted by license only \ end {minipage} \hfill \ ...

... Путеводитель астронома по интернет: . ... Астрономические данные в Сети - где искать и как пользоваться? Сайты с астрономической библиографией . ... Последнее время на страницах прессы очень много стали говорить о астероидах. ... Достаточно вспомнить о Тунгусском метеорите, которому посвящен не один сайт даже в русском сегменте сети: загляните на интереснейшие сайты http://tunguska.ru/ и http://tunguska.tomsk.ru/ Мало того, астероиды сталкиваются не только с Землей, но и друг с другом! ...

Moscow Astronomical Plate Archives: . Contents, Digitization, Current and Possible Applications . ... We describe the astronomical plate archives in Moscow and Zvenigorod and the existing digitization projects. ... 2 The Plate Archive of the Sternberg Institute . The contents of the most important Moscow astronomical plate archive, that of the Sternberg Astronomical Institute, was briefly presented in Shugarov et al. [1] in 1999. ... THE MOSCOW PLATE COLLECTION (STERNBERG INSTITUTE) . ...

... 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. ...