|
ca. 800 BC
The first plausible recorded sunspot observation
ca. 350 BC
Sun circling under a sheltering sky
ca. 200 BC
The distance to the Sun |
1128
The first sunspot drawing
1185
The first description of solar prominences
1543
The Sun moves to center stage |
1610
First telescopic observations of sunspots
1644
The Sun as a star
1645-1715
Sunspots vanish
1687
The mass of the Sun
1774-1801
The physical nature of sunspots
1796
The nebular hypothesis |
1802
Black lines in the Sun
1817
Solar spectroscopy is born
1838
The solar constant
1843
The sunspot cycle
1845
The first solar photograph
1848
The sunspot number
1852
The sunspot cycle is linked to geomagnetic activity
1858-1859
The solar differential rotation
1859
First observation of a solar flare
1859
The chemical composition of the Sun
1860
First observations of a coronal mass ejection
1881
The solar constant, again
1908
The magnetic nature of sunspots
1919
The Sun's magnetic cycle
1931
The coronagraph |
