... Солнечные затмения 2004-2024 . ... Short report about viewing of Venus Transit at 8 June 2004. ... The same situation was at Berdyansk at the June, 8, 2004, when Venus Transit occur. ... At the photo below, you can see how cloudy it was when the transit began. ... You can see it at the picture 1. ... I would like to thank Illya Pustovit, who kindly gave me a permission to use his digital camera for taking pictures of this Venus Transit and helped me a lot with working on gotten pictures. ...
RADIOASTRONOMIE Notions de base J-J. MAINTOUX F1EHN Original : Octobre 2008 Mise Ю jour : DИcembre 2009 Radioastronomie - Sommaire Les ondes ИlectromagnИtiques Principales caractИristiques d'un tИlescope Les pionniers de la radioastronomie Quelques radiotИlescopes modernes Radioastronomie amateur Radioastronomie Solaire et Lunaire Radioastronomie Ю 21 cm Observation de notre galaxie (principes) Bibliographie et sites web utilisИs ... Puis voir page « Radioastronomie ». ...
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... Three energetic mechanisms are considered: multiple supernova explosions (SNe), a hypernova explosion associated with a gamma ray burst (GRB), and the vertical impact of a high velocity cloud (HVC). ... As a consequence, multiple SNe form rings with a high ring-to-center contrast K < 100 in the HI column density, whereas single hypernova explosions form rings with K < 10. ... Our simulations show (see Fig. 6) that both multiple SNe and single hypernovae may form rings of up to 2 kpc in diameter. ...