Турбулентные движения горячего газа в скоплениях галактик. ... Получены ограничения на параметры движений газа. ... Фрагменты оболочки могут достигать границ пузыря и обогащать окружающий газ тяжелыми элементами. ... Churazov , E., Vikhlinin , A., Zhuravleva , I., Schekochihin , A., Parrish, I., Sunyaev , R., Forman, W., Bohringer , H., Randall, S., 2012, 'X-ray surface brightness and gas density fluctuations in the Coma cluster', Monthly Notices of the Royal Astronomical Society 421, 1123-1135. ...
Educator's Guide to Eclipses . ... In a solar eclipse you observe the Sun (using only safe methods, of course). ... In a lunar eclipse you observe the Moon. ... Because of the geometry described below, you can only view a solar eclipse when the Sun is up, and the Moon is nowhere to be seen. ... Eclipses occur when the Sun, Earth and Moon line up. ... In a solar eclipse the Moon passes directly in front of the Sun. ... In a lunar eclipse the Moon moves into Earth's shadow. ...