Explore the Night with Bob King

Giant Sunspots, Flares Presage Arrival of Solar Storm

Two big, naked-eye sunspot groups are putting on a splendid show this week. We're also in the crosshairs for a strong geomagnetic storm and possible auroras.

Spotless Sun

Stellar Science

Is Our Sun Slowing Down in Its Middle Age?

The Sun, now halfway through its life, might be slowing its magnetic activity, which could lead to permanent changes in the sunspots and auroras we see.

Magnetic manifestations

Explore the Night with Bob King

Fun in the Sun: A White-Light Guide to Our Nearest Star

We examine the fascinating solar phenomena that anyone with a small scope and safe solar filter can see, whether the Sun's in eclipse or not.

Celestial News & Events

The Spotless Sun

The Sun has been unusually quiet lately. Since the start of 2017, only a single tiny sunspot has made a brief appearance on the solar disk.

active region 1520

Astronomy and Society

How Astronomers Count Sunspots

A multi-year investigation revealed errors in our understanding of the Sun.

Faculae along solar limb on July 18, 2014

Celestial Objects to Observe

Blank Sun? Faculae to the Rescue!

Fascinating faculae provide a way for anyone with a small telescope to track the ups and downs of the solar cycle — even when there are no sunspots.

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