Thomas Pesquet posted a photo:

Le beau Danube, moins bleu que blanc lorsqu’il traverse Vienne sous le reflet du soleil ☺. Strauss nous aurait menti ?!

Vienna, Austria, with the blue Danube appearing very white in the reflection of the Sun! Sorry to disappoint the romantics who thought it was always blue ☺

Credits: ESA/NASA–T. Pesquet

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