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Group Sunspot Numbers (Doug Hoyt re-evaluation) 1610–1995; Wilson, Robert M. (April 2014). Comparison of the Variations of Sunspot Number, Number of Sunspot Groups, and Sunspot Area, 1875–2013. Huntsville, AL: National Aeronautics and Space Administration, Marshall Space Flight Center
The Dunn Solar Telescope, also known as the Richard B. Dunn Solar Telescope, [ 1] is a unique vertical-axis solar telescope that specializes in high-resolution imaging and spectroscopy. It is located at Sacramento Peak in Sunspot, New Mexico. It is the main telescope at the Sunspot Solar Observatory, operated by New Mexico State University in ...
Solar activity and climate. Solar irradiance (yellow) plotted with temperature (red) since 1880. Patterns of solar irradiance and solar variation have been a main driver of climate change over the millions to billions of years of the geologic time scale. Evidence that this is the case comes from analysis on many timescales and from many sources ...
Sunspot formation is cyclical, and the current solar cycle has reached the highest number of sunspots since 2001, NOAA announced Friday. With the current period of high activity, scientists ...
Sunspot AR3664 visible on the bottom right part of the Earth-facing side of the sun on May 9, 2024. (NASA/ Solar Dynamics Observatory) Millions of people who went out of their way to find eclipse ...
Scientists analyzed famed astronomer Johannes Kepler’s 1607 sketches of sunspots to solve a mystery about the sun’s solar cycle that has persisted for centuries. Johannes Kepler thought he ...
Solar cycle 25 is the current solar cycle, the 25th since 1755, when extensive recording of solar sunspot activity began. It began in December 2019 with a minimum smoothed sunspot number of 1.8. [2] It is expected to continue until about 2030. [3][4]
Horace W. Babcock proposed in 1961 a qualitative model for solar dynamics. [1] On the largest scale, the Sun supports an oscillatory magnetic field, with a quasi-steady periodicity of 22 years. [2] [3] This oscillation is known as the Babcock-Leighton dynamo cycle, proposed by Robert B. Leighton, amounting to the oscillatory exchange of energy ...