I'd say so. The length of times that flag is static for prior to the astronaut passing, and the length of time it continues to oscillate after he passes, do not at all agree with any kind of atmosphere being present. It's hard to tell but he may even have made slight contact with the corner as he passed, which would also cause movement consistent with that seen (the 'away' motion at first being hidden by the astronaut so the first we see is a motion towards where he was).

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"The very powerful and the very stupid have one thing in common: They don't alter their views to fit the facts, they alter the facts to fit their views." The Doctor, Doctor Who: The Face of Evil.