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The Sunspot Solar Observatory (SSO) is an astronomical observatory designed for the study of the Sun. The observatory is operated by New Mexico State University (NMSU) and the U.S. National Solar Observatory (NSO). It is split between operations at the telescope facility at Sunspot, New Mexico, and data and management at the Department of ...
Alvena Storm. Alvena (Suhl) Storm (March 10, 1902 – June 11, 2003) [1] was the American Professor Emerita of Geography at San Diego State University (1926-1966) and a founding member of the department, serving as department chair. She was considered an expert in the geography of the Western United States. [2]
Sunspot number is correlated with the intensity of solar radiation over the period since 1979, when satellite measurements became available. The variation caused by the sunspot cycle to solar output is on the order of 0.1% of the solar constant (a peak-to-trough range of 1.3 W·m −2 compared with 1366 W·m −2 for the average solar constant).
The solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a nearly periodic 11-year change in the Sun 's activity measured in terms of variations in the number of observed sunspots on the Sun's surface.
The Dunn Solar Telescope also known as the Richard B. Dunn Solar Telescope [1] is a unique vertical-axis solar telescope, in Sunspot, New Mexico located at Sacramento Peak, New Mexico. It is the main telescope at the Sunspot Solar Observatory, operated by New Mexico State University in partnership with the National Solar Observatory through ...
Joy's law (astronomy) Sunspot group in the Sun's northern hemisphere with tilt angle. In solar physics, Joy's law is an empirical law for the distribution of sunspots in active regions. It states that the magnitude at which the sunspots are "tilted"—with the leading spot (s) closer to the heliographic equator than the trailing spot (s ...
A prediction for Sunspot Cycle 24 (2008-2020) gives a smoothed sunspot number maximum of about 66 in the Summer of 2013. Current observations make this the smallest sunspot cycle since records began in the 1750s. [1] Solar maximum is the regular period of greatest solar activity during the Sun 's 11-year solar cycle.
Sunspot and infrared spectral line measurements made in the latter part of the first decade of the 2000s suggested that sunspot activity may again be disappearing, possibly leading to a new minimum. From 2007 to 2009, sunspot levels were far below average. In 2008, the Sun was spot-free 73 percent of the time, extreme even for a solar minimum.