Mysterious 'ghostly' shadows larger than planet Earth reappeared on Saturn's rings. NASA says it expects even more to appear soon
You can see Saturn's spokes as dark bruises on the left side of the planet's rings. NASA, ESA, STScI, Amy Simon (NASA-GSFC) NASA's Hubble telescope observed the latest series of mysterious dark spots on Saturn's rings. Scientists have observed these "spokes" for decades but don't know their origin…
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