. Next: Luminosity decay Up: Supernovae and their remnants Previous: The nature of supernovae . љ . Failure of central energy supply . Gravitational collapse . Nature depends on mass . Core mass: . 1.9 - 2.5 M neutron star (type II) . < 1.9 M no remnant (type Ia) . > 2.5 M black hole (type II) . Core collapse causes neutrino emission . Core bounce causes explosion . Few hours delay between neutrinos and light . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

... Gallery . ... Clearing the front offices. Note the collapseтАж . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Clearing the front offices. Note the collapsed wall. Description: NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ... NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

Общая Астрономическая Конференция > Практика > Астрономическая фотография > Ганимед и Каллисто Майка Сэлвея . ... Просмотр полной версии : Ганимед и Каллисто Майка Сэлвея . ... У итальянцев пару лет назад Ганимед раза в три больше был. ... Вы дали ссылку на фото австралийского ЛА и преподнесли его (фото) как невероятное достижение. Я заметил, что это "достижение" "не ахти что" в сравнении с работами итальянских любителей. ... 03.03.2007, 17:10 . ... Это объективно не особо впечатляющее достижение. ...

This diagram shows the effect of the 'collapse' value of the 'border-collapse' property. ... The left and right content, padding, border, and margin areas of each cell are labeled by rotated text above each of the areas. Each (red, dotted) grid line bisects the border between two cells. The table width is indicated below the cells as encompassing all the left and right content, padding, border, and margin areas of the cells, except for the cells that touch the sides of the table. ...

... Collapse in Hebes Chasma on Mars . ... 12.08.2014 . ... Inside Hebes Chasma is Hebes Mensa , a 5 kilometer high mesa that appears to have undergone an unusual partial collapse -- a collapse that might be providing clues. ... Material from the mesa appears to have flowed onto the floor of the chasm, while a possible dark layer appears to have pooled like ink on a downslope landing. ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: Mars - Mars-Express . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2014 August 12 . Collapse in Hebes Chasma on Mars . ... Explanation: What's happened in Hebes Chasma on Mars? ... Inside Hebes Chasma is Hebes Mensa , a 5 kilometer high mesa that appears to have undergone an unusual partial collapse -- a collapse that might be providing clues. ... Help APOD: Take the APOD 2014 Calendar Usage Poll . ...

... The default is to average the cube, but there are options to median or ; total combine instead. ... Default is all. ; cropmult= crop the collapsed image to multiples of this many pixels ; (for consistency with what cube_rebin does for odd axis ; sizes) ; / median median collapse it ; / total total it, instead of averaging or medianing. ; /silent suppress printed output ; OUTPUTS: ; a modified cubestruct (really an image structure ...

... Tonight's Sky . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Animation of a star collapse . ... NASA has announced the detection of a possible strange quark star.Click here to visit the Chandra X-ray Observatory web site and watch an animation of a star collapse.. Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... ESO Science Outreach Network . ... A crane collapsing during the construction phase of the ESO 3.6-metre Telescope in La Silla Observatory, Chile. ...

... Сегодня: 10 апреля 2016 г. На 10 июня у экипажа МКС Геннадия Падалки и Майка Финке намечен выход в открытый космос для проведения ремонта одного из вышедших из строя гироскопов (им предстоит заменить на нем модуль системы управления электропитанием). ... После попыток выяснить причину неполадок, система охлаждения в скафандре Финке все же заработала нормально, но со скафандром Падалки все осталось по-прежнему. ... Неполадки в системах охлаждения американских скафандров для выхода в открытый космос ....

Университет . ... Наука Патенты Устройство охлаждения и очистки газа . Год: 2005 г., . ... Приоритет заявки: 2005-05-30, . Дата публикации: 2005-11-10 . ... 2005 | ... Самарский государственный аэрокосмический университет имени академика С.П. Королева . национальный исследовательский университет)" . ... Тел.: 846) 335-18-26 Факс: (846) 335-18-36 . Содержание Интернет-портала СГАУ: . тел. +7 (846) 267-45-60, . e-mail: webmaster@ssau.ru . ... Тел.: (846) 267-44-99 . ...

... Телескопостроение, оптика (Модераторы: I.A.R. , Ivan7enych ) ? Кулер для охлаждения телескопа . ... Ответ #80 : 02.05.2005 [20:24:09] ? ... Записан . Сообщений: 5 951 . Рейтинг: +41/-8 . ... Цитата: Hell от 01.05.2005 [19:19:30] А не легче ли такую трубу с элементами охлаждения.. Скажем сделать спиралевидную трубку с двойной герметичной стенкой и налить туда ледяную воду на одном конце поставить кулер а другой конец вывести на зеркало? все же конструкция получится менее фантастичной.. ...

... 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. ...

... For this paper: postscript PPEUC CMB index 1 Introduction.. ... We present a new model for the formation of spherically symmetric clusters in an expanding Universe. Both the Universe and the collapsing cluster are governed by the same pressure less fluid equations for which a uniform initial density profile is assumed. ... The computation of photon paths allows us to evaluate the gravitational effects imprinted on a Cosmic Microwave Background (CMB) photon passing through such an evolving mass. ...

... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . Research . Adaptive Optics . ... General interest seminars . ... Information . ... Historical highlights . Historical research . Historical archive . ... Friends of Arcetri . ... Arcetri library . The Observatory building . ... Arcetri in Autumn . ... Adaptive optic test mirror . ... LBT adaptive secondary mirror . ... Arcetri domes . ...

Next: Other parameters of the Up: The Model Previous: Initial binary parameters . As we only deal with initially massive binary systems (their primary's mass is higher than 10 ), which are capable of evolving off the main sequence during less than years, the compact stars left behind stellar evolution are (in the case of the most massive stars) NSs and BHs. ... For a NS belonging to a binary, the evolution complicates as the secondary star evolves: for example, (recycling), etc. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : If the Sun collapses into a black hole, the Earth and all the other planets will get sucked in. Good astronomy : If the Sun were to collapse into a black hole, we would feel no difference in the gravity as measured at the Earth. ... The same applies if the Sun were to collapse into a black hole. ... Therefore, the gravity of the Sun felt at the Earth would remain the same. ... So it is with the black hole Sun. ... 2008 Phil Plait. ...

Next: M.E. Bailey, Director Up: Research Previous: C.S. Jeffery, Research Astronomer Contents . ... How do Stars Form? ... Other Work and Activities . ... The interaction of young stars with their surroundings are accentuated within Herbig-Haro Objects, where streams and `bullets' of ejected gas impact on the ambient molecular clouds. ... The astrophysical jets are spectacular. ... Michael Smith and collaborators have searched for, and found, the first evidence of rotation within the jets. ...

... Future seminars . ... Special Relativistic Simulations of Magneto-driven Jet from Core-Collapse Supernovae " . ... We performed 2.5 dimensional magneto-hydro dynamical simulation of core-collapse supernovae. ... How this collimated jet is produced due to the process of core-collapse of massive star?There are two main energy-sources for the explosion. ... Since the previous works are performed separately at each stage such as core-collapse and jet-propagation, many uncertainty remains in each stage. ...