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Date: Sat, 5 Aug 2023 13:24:09 -0700 (PDT)
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From: Richard Verret <rverret97@gmail.com>
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Le 05/08/2023 =C3=A0 18:26, Richard Hachel a =C3=A9crit :
> Chez moi, comme chez les id=C3=A9alistes berkeleyens, le soleil est l=C3=
=A0 o=C3=B9 on le voit.

Salut Richard ! Pourrais-tu me dire quelle est la vitesse de la lumi=C3=A8r=
e provenant d=E2=80=99un corps qu=E2=80=99on observe? Est-ce la vitesse obs=
ervable ou la vitesse r=C3=A9elle ?