Sun Day
Here is a promo for the 2019 International SunDay Festival in Alton, Illinois. It has run from 2015 to 2019 and has been on hiatus due to Covid restrictions.
International SunDay events have been staffed by members of the Astronomical Society of Eastern Missouri, The Nature Institute in Godfrey, Illinois, Alton Public Libraries and other groups. Safe solar viewing has been featured, as well as displays related to natural history.
International SunDay events have been staffed by members of the Astronomical Society of Eastern Missouri, The Nature Institute in Godfrey, Illinois, Alton Public Libraries and other groups. Safe solar viewing has been featured, as well as displays related to natural history.
WARNING: observing the Sun without proper protection permanently damages eyes. With current medical technology, there is no way to fix an eye blinded by the Sun.
WARNING: observing the Sun without proper protection permanently damages eyes. With current medical technology, there is no way to fix an eye blinded by the Sun.
From the B&H Photo and Video website.
A properly filtered telescope can show solar features. Our Sun is dynamic, generating massive amounts of energy that is released into space. A good hydrogen alpha solar telescope can show active Sun features in real time. The photo at the left shows prominences (flaring outward from the Sun's surface) and granulation (mottled appearance on the Sun's surface). A telescope with a solar filter can also show sunspots.
A properly filtered telescope can show solar features. Our Sun is dynamic, generating massive amounts of energy that is released into space. A good hydrogen alpha solar telescope can show active Sun features in real time. The photo at the left shows prominences (flaring outward from the Sun's surface) and granulation (mottled appearance on the Sun's surface). A telescope with a solar filter can also show sunspots.
Photo from Sky & Telescope magazine
The Sun shows spots darker than the surface color. The temperature at sunspots is a bit lower than the rest of the Sun's surface.
The Sun shows spots darker than the surface color. The temperature at sunspots is a bit lower than the rest of the Sun's surface.
Graph from NOAA.climate.gov
Sunspot numbers are at their maximum in a cycle of 11 years. The graph shows past activity.
Sunspot numbers are at their maximum in a cycle of 11 years. The graph shows past activity.