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Solar Cycle 20
Solar cycle 20 was the twentieth solar cycle since 1755, when extensive recording of solar sunspot activity began. The solar cycle lasted 11.4 years, beginning in October 1964 and ending in March 1976. The maximum smoothed sunspot number observed during the solar cycle was 156.6 (November 1968), and the starting minimum was 14.3.SIDC Monthly Smoothed Sunspot Number. During the minimum transit from solar cycle 20 to 21, there were a total of 272 days with no sunspots.Spotless Days.Solaemon's Spotless Days Page. Comparison with other cycles shows that geomagnetic activity during the declining phase of cycle 20 (1973–1975) was unusually high. Data from solar cycle 20 was used to build the K-1974 Solar particle event, solar proton fluence model, used for planning space missions during solar cycle 21. August 1972 solar storm An extremely active active region, McMath 11976, produced a historic series of solar flares and coronal mass ejections (CMEs) in August 1972. One CME travele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Cycle 19
Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. "solar panels") ** Solar calendar, a calendar whose dates indicate the position of the Earth on its revolution around the Sun * Solar Maximum Mission The Solar Maximum Mission satellite (or SolarMax) was designed to investigate Sun, Solar phenomena, particularly solar flares. It was launched on February 14, 1980. The SMM was the first satellite based on the Multimission Modular Spacecraft bus ..., a satellite * SOLAR (ISS), an observatory on International Space Station Music * Solar (composition), "Solar" (composition), attributed to Miles Davis * Solar (Red Garland album), ''Solar'' (Red Garland album), 1962 * Solar (Taeyang album), ''Solar'' (Taeyang album), 2010 * ''Solar'', a 2011 album by Rubik (band), Rubik * "Solar", a song by Northlane from ''Mesmer (Northlane album), Mesmer'', 2017 * SOLAR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Cycle 21
Solar cycle 21 was the 21st solar cycle since 1755, when extensive recording of solar sunspot activity began.Kane, R.P. (2002).Some Implications Using the Group Sunspot Number Reconstruction. ''Solar Physics'' 205(2), 383-401. The solar cycle lasted 10.5 years, beginning in March 1976 and ending in September 1986. The maximum smoothed sunspot number observed during the solar cycle was 232.9, in December 1979, and the starting minimum was 17.8.SIDC Monthly Smoothed Sunspot Number. During the minimum transit from solar cycle 21 to 22, there were a total of 273 days with no sunspots.Spotless Days.What's Wrong with the Sun? (Nothing) more information: Spotless Days. ""Solaemon's Spotless Days Page. The largest solar flare of this cycle (X15) occurred on July 11, 1978. This solar cycle marked the beginning of systematic monitoring of the total solar irradiance from space. Kopp, G. (2016).Magnitudes and timescales of total solar irradiance variability. ''JSWSC'' 6, A30. See also *Sola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skylab Solar Flare
Skylab was the first United States space station, launched by NASA, occupied for about 24 weeks between May 1973 and February 1974. It was operated by three separate three-astronaut crews: Skylab 2, Skylab 3, and Skylab 4. Major operations included an orbital workshop, a solar observatory, Earth observation, and hundreds of experiments. Unable to be re-boosted by the Space Shuttle, which was not ready until 1981, Skylab's orbit eventually decayed, and it disintegrated in the atmosphere on July 11, 1979, scattering debris across the Indian Ocean and Western Australia. Overview Skylab was the only space station operated exclusively by the United States. A permanent station was planned starting in 1988, but funding for this was canceled and replaced with United States participation in an International Space Station in 1993. Skylab had a mass of with a Apollo command and service module (CSM) attached and included a workshop, a solar observatory, and several hundred lif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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