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The Nubium Whisker

View another scratch on the Moon's feature-filled face.
RELATED TOPICS: SOLAR SYSTEM | THE MOON
OMearaStephen
The Moon’s Mare Nubium (the Sea of Clouds) is most noted for its Straight Wall, a 75-mile-long (121 kilometers) cliff face that casts a remarkable shadow about a week after New Moon. Visible as a “cat scratch” in eastern Mare Nubium, the Straight Wall is the youngest large-scale fault on the Moon visible through small telescopes. But Mare Nubium has other hidden treasures, including a longer rille known as Rima Hesiodus, a great visual challenge for small-scope users.

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