Cassini and the Great Red Spot

^ 0 After Galileo, as the quality of lenses and telescopes improved, observers began to detect markings on Jupiter's surface. In 1665, Giovanni Dominico Cassini dis-~ ;> covered a "permanent spot" on Jupiter and followed it on and off for several years.

i2 ¡J Cassini also discovered Jupiter's equatorial current, the flattening of its poles, and q JQ its limb darkening. Later, when the Great Red Spot was recognized in 1879, it was

-C suggested that this was a rediscovery of Cassini's spot. However, there is really no

TO empirical evidence to support this, and we must be careful not to state this as fact

As the years went by and telescopes and lenses continued to improve, more and more discoveries were made regarding Jupiter. Many of the people making these discoveries would be considered amateurs today. However, these amateurs were serious, dedicated, careful observers. And as we will see, there continues to be room in astronomy for amateurs today, and perhaps more so than ever!

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