The lunar eclipse on 27 July was the longest of the 21st century, lasting 1 hour and 43 minutes. It also coincided with the planet Mars, visible here below this column, at its closest distance to Earth in decades.
It gave millions of people the chance to view the phenomena and offered an "out-of-this-world" photo opportunity.
Nordex sent photographer Ulrich Mertens to the Port of Hamburg to capture this photo with one of the three wind turbines installed at the site.
A blood moon occurs when the sun, Earth and moon line up almost exactly with the planet smack in the middle. Earth’s shadow is cast across the moon, giving it its deep red colour.