Presents an impressive photo snapped by Skylab in 1973 of the Sun as it erupts in a massive solar prominence, or flare.
May, 1998 article reports on a "sunquake" produced by a powerful solar flare. Includes photos and a QuickTime movie of the event.
Provides advice for teachers on safely observing the sun and sunspots by projecting an image on paper.
Learn how Johannes Kepler didn't quite discover sunspots, so that Galileo and Thomas Harriot got the credit
Solar flares are explored at this stellar site. Find out what they are, why they are studied, and how they effect the Earth.
Learn about these violent events on the sun and the phenomena they produce, including coronal mass ejections, solar wind and the aurora.
Describes the features of sunspots and their use in tracking the Sun's rotational period. Includes photos and a table of sunspot counts.
Presents ranks, event dates and X-Ray classifications of the most energetic solar flares since 1976.
Outlines the techniques by which sunspot cycles and solar storms are predicted. Includes links to other essays on solar structure and behavior.
Explains the characteristics and causes of these bubbles of gas ejected from the Sun, and their connection with solar flares and prominences.
Learn about phenomena of the Sun's photosphere including sunspots, faculae, granules and supergranules. View detailed images of each.
Presents detailed images of solar flares and discusses their characteristics, methods of observation, and relationship to magnetic shear.
Explains how the number of sunspots is measured, and provides charts and a "butterfly diagram" of their cyclical appearances.
June, 1999 news release discusses measurements of the spectral behavior of solar flares, which tend to fall into two categories.
Examine a detailed photo of an 11th magnitude quake on the Sun that followed a moderate solar flare.
Get daily, monthly, and yearly sunspot numbers, see sunspots graphed over time, or find out about this organization that collects sunspot data.
Explains why sunspots appear dark and presents photos and graphs of these solar phenomena.
Find out about solar cycles, sunspots, solar flares, and solar winds. Get today's sunspot number, and see solar animations.
Chronicles the observation of sunspots through the centuries, and presents an interactive time-graph of their minimums and maximums.
November, 2000 article reports on a series of solar eruptions, the geomagnetic storms they produced, and their effects, including the aurora.
Watch MPEG movies showing the eruption of flares on the sun, and examine images of "coronal holes" through which particles can escape.
February 2000 article reports on the appearance of two sunspot groups and the likelihood of them producing solar flares. Includes photos.