Since Galileo first observed them through his telescope in the early 1600s, sunspots have fascinated scientists.

Sunspots are the most striking phenomenon of the solar magnetic field. After the invention of the telescope early in the 17th ...

Object Details Author Land, Barbara Contents Hans Lippershey's ingenious spyglass -- Galileo's new window on the heavens -- Johannes Kepler, the nearsighted wizard -- Isaac Newton's reflecting ...