A new, bright spot in the clouds of Venus was found by amateur astronomer Frank Melillo on 19 July (Illustration: Melillo/Maxson/ESA/University of Wisconsin-Madison/ALPO)
From New Scientist:
A strange spot emerged on Venus last week, and astronomers are not sure what caused it. They hope future observations will reveal whether volcanic activity, turbulence in the planet's atmosphere, or charged particles from the sun are to blame.
Amateur astronomer Frank Melillo of Holtsville, New York, first spotted the new feature, which is brighter than its surroundings at ultraviolet wavelengths, on the planet's southern hemisphere on 19 July. That same day, an amateur observer in Australia found a dark spot on Jupiter that had been caused by a meteoroid impact.
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