Sunspots can be as large as 50,000 miles in diameter.
They were first recorded around 28BC in ancient China.
Sunspot's magnetic field is about 2,500 times stronger than earth's.
They occur in pairs with magnetic fields pointing in opposite directions.
Sunspots are about the same size as Earth.
Sunspots are dark because they are much cooler than the rest of the sun.
Sunspots cause the northern lights.
Sunspots cause solar flares.
Sunspots are plotted on a butterfly diagram.
Sunspots can last from days to weeks.
Sunspots don't only form on our sun.
The Maunder Minimum of the late 17th century caused a little ice age.
The safest way to view sunspots is by way of projection.
Royal Observatory of Belgium and the National Oceanic and Atmospheric Administration keeps track of sunspots.
Two official numbers of sunspots are recorded because of the two places they are recorded.
Spectroscopes and spectrohelioscopes are used to observe sunspots.
Land based solar telescopes and satellites observe sunspots.
Sunspots can be seen with the naked eye. (but it's not safe!!)
Sunspots can be seen with a basic telescope.
It is believed that the ancient Greeks understood that sunspots existed, but not what they were.
Johann Goldsmid, Galileo Galilei, Christopher Schiener, and Thomas Herriot are all accredited for finding sunspots.
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