1600s
1700s-1800s
late 1800s-early 1900s
late 1800s
1968
1982
1999-200x
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Sunspots: J. Goldschmidt (Fabricius) ==> observation of sunspots using a
refracting telescope followed by Galileo, ... ;
(
solar rotation)
Sunpost Cycle: Harriot, Schwabe, Scheiner,
Carrington, Sporer, ... , sunspot cycle and other phenomenology
Solar Rotation: Vogel, Zollmer, Adams, Hale, ... spectroscopic measurements
of Solar rotation
Stellar Rotation: Abney (and Schlesinger) spectroscopioc measurements of
rotation of extra-solar stars
Pulsars: Crab Pulsar, spin period 0.033 sec
Millisecond Pulsars: PSR1957+20, spin period 1.56 msec
Kerr Black Holes: Maximally rotating black holes
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