Solar System: 0. Sun
Sun includes topics such as Chromosphere, Corona, Geomagnetic storm, Helioseismology, Maunder minimum, Solar activity and Sunspots.
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Featured Article
Eclipse: Lunar - Earth's Shadow
In a lunar eclipse, if the width of the shadow of the Earth is twice the width of the Moon, then the width of the Earth itself is (very nearly) three times that of the Moon--not twice, as one might...


