Berlin — The European Space Agency says high-resolution images the Rosetta space probe took during a swoop close to a comet it’s been tracking for months show boulders on the comet’s surface as well as “stunning details of the contrasting terrain.”

The agency said Monday the boulders ranged in size from a few yards to a few tens of meters, and lie “scattered across the whole surface of the comet.” It says the sun was directly behind Rosetta as the pictures were taken, providing optimal light conditions.

While swooping in as close as under 4 miles Saturday to take the pictures, Rosetta’s instruments also sampled the innermost parts of comet 67P/Churyumov-Gerasimenko’s atmosphere.

Rosetta, which has been alongside the comet since August, is now moving out to take far-view images.

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