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 <me@pla.net.invalid>
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