In 1607, Johannes Kepler projected an image of the Sun onto a piece of paper and spotted a dark smudge. He thought he was ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The earliest datable sunspot drawings based on Johannes Kepler's solar observations with camera ...

How can 400-year-old sunspot drawings help modern-day scientists with solar cycles? This is what a recent study published in The Astrophysical Journal Letters hopes to address as an international team ...

From 1645 until 1715, the Sun experienced a sustained period of depressed solar activity known as the grand solar minimum, or ...