http://www.lemonde.fr/opinions/article/2009/10/27/la-lumiere-une-sour...
Claude Cohen-Tannoudji, membre de l'Académie des sciences:
"L'astronome Edwin Hubble a pu ainsi montrer, en 1929, que les
différentes galaxies s'éloignent les unes des autres avec une vitesse
proportionnelle à leur distance, ce qui ne peut se comprendre que si
l'Univers est en expansion."

La vérité:

http://www.time.com/time/magazine/article/0,9171,757145,00.html
"Other causes for the redshift were suggested, such as cosmic dust or
a change in the nature of light over great stretches of space. Two
years ago Dr. Hubble admitted that the expanding universe might be an
illusion, but implied that this was a cautious and colorless view.
Last week it was apparent that he had shifted his position even
further away from a literal interpretation of the redshift, that he
now regards the expanding universe as more improbable than a non-
expanding one."

http://www.springerlink.com/content/w6777w07xn737590/fulltext.pdf
Misconceptions about the Hubble recession law
Wilfred H. Sorrell, Astrophys Space Sci
"Reber (1982) pointed out that Hubble himself was never an advocate
for the expanding universe idea. Indeed, it was Hubble who personally
thought that a model universe based on the tired-light hypothesis is
more simple and less irrational than a model universe based on an
expanding spacetime geometry (...) ...any photon gradually loses its
energy while traveling over a large distance in the vast space of the
universe."

http://www.sciscoop.com/story/2008/10/30/41323/484
"Does the apparently constant speed of light change over the vast
stretches of the universe? Would our understanding of black holes,
ancient supernovae, dark matter, dark energy, the origins of the
universe and its ultimate fate be different if the speed of light were
not constant?.....Couldn't it be that the supposed vacuum of space is
acting as an interstellar medium to lower the speed of light like some
cosmic swimming pool? If so, wouldn't a stick plunged into the pool
appear bent as the light is refracted and won't that affect all our
observations about the universe. I asked theoretical physicist Leonard
Susskind, author of The Black Hole War, recently reviewed in Science
Books to explain this apparent anomaly....."You are entirely right,"
he told me, "there are all sorts of effects on the propagation of
light that astronomers and astrophysicists must account for. The point
of course is that they (not me) do take these effects into account and
correct for them." "In a way this work is very heroic but unheralded,"
adds Susskind, "An immense amount of extremely brilliant analysis has
gone into the detailed corrections that are needed to eliminate these
'spurious' effects so that people like me can just say 'light travels
with the speed of light.' So, there you have it. My concern about
cosmic swimming pools and bent sticks does indeed apply, but
physicists have taken the deviations into account so that other
physicists, such as Susskind, who once proved Stephen Hawking wrong,
can battle their way to a better understanding of the universe."