The Sunspot Cycle
The number of sunspots observed on the “surface” of the Sun varies from year to year. This rise…
Climate Change Research
The Sun’s Chromosphere (Lower Atmosphere)
The lower region of the Sun’s atmosphere is called the chromosphere. Its name comes from the Greek…
Sunspots
Sunspots are dark, planet-sized regions that appear on the “surface” of the Sun. Sunspots are…
Solar Prominences
Large loop-like structures on the edge of the solar disk sometimes stand out brightly against…
Coronal Mass Ejection (CME)
A Coronal Mass Ejection (CME) is an explosive outburst of solar wind plasma from the…
Solar Flare
Solar flares are huge explosions on the Sun. A flare appears as a sudden, intense…
Solar Filaments
Solar filaments are dark lines or curves that sometimes appear in pictures of the Sun….
Red Light (H-alpha)
This photo of the Sun was taken on July 18, 2000. It was taken using…
Plasma
Plasma is one of the four common states of matter. A plasma is an electrically…
Ionosphere
Earth’s atmosphere contains a series of regions that have a relatively large number of electrically charged…