Path: eternal-september.org!reader02.eternal-september.org!news.gegeweb.eu!gegeweb.org!usenet-fr.net!proxad.net!feeder1-2.proxad.net!cleanfeed3-b.proxad.net!nnrp1-2.free.fr!not-for-mail Newsgroups: fr.sci.astrophysique,fr.sci.astronomie X-Mozilla-News-Host: news://nntp.free.fr:119 From: robby Subject: =?UTF-8?Q?couche_de_sodium_=c3=a0_90km?= Date: Fri, 19 Nov 2021 08:46:18 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 8bit Content-Language: fr Lines: 7 Message-ID: <6197564a$0$1331$426a74cc@news.free.fr> Organization: Guest of ProXad - France NNTP-Posting-Date: 19 Nov 2021 08:46:18 CET NNTP-Posting-Host: 91.168.150.105 X-Trace: 1637307978 news-2.free.fr 1331 91.168.150.105:46170 X-Complaints-To: abuse@proxad.net quelle est la cause de la couche de sodium à 90km d'altitude ? ( utilisée pour les étoiles artificielles de l'astronomie en optique adaptative ) -- Fabrice