In the 1600s, an Italian astronomer named Gian Domenico Cassini made a remarkable discovery while observing Jupiter. He discovered a large spot on the planet, now known as the Great Red Spot or Permanent Spot. This feature is believed to be evidence of a powerful storm on Jupiter. However, recent research suggests that the storm observed today is not the same one Cassini saw nearly four centuries ago.
What appears as a red spot from space is actually a huge anticyclone vortex twice the size of Earth. Modern observations indicate that the storm involves winds raging at speeds of up to 400 miles per hour. The distinctive color of the spot may be due to interactions between elements in Jupiter’s atmosphere and various forms of radiation. Despite being known for centuries, the Great Red Spot still holds numerous mysteries for researchers to uncover.
Cassini was recognized as a pioneer of telescopic astronomy and first observed the spot in 1665 as a dark oval. He noted that it appeared to be permanent and frequently reappeared in the same location with consistent size and shape. Other astronomers documented sightings of the spot until 1713, after which observations ceased. It was not until 1831 that scientists once again reported a spot in the same spot Cassini had identified.
In a study published in Geophysical Research Letters, researchers utilized historical observations to monitor the size and movement of the spot over time, comparing them with modern data. By simulating various scenarios, they concluded that
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