Definitions for "Solar cycle"
Related Terms:
Sunspot cycle, Solar maximum, Solar year, Solar minimum, Short-period comet, Sidereal year, Synodic period, Sidereal month, Synodic, Solar calendar, Sidereal period, Lunar cycle, Equation of time, Lunation, Month, Maunder minimum, Sidereal day, Solar day, Solar time, Tropical year, Sunspots, Sidereal, Ephemeris time, Anomalistic month, Saros cycle, Synodic month, Lunar day, Sidereal time, Halley's comet, Ephemeris, Solar return, Phase , Saros , Heliosphere, Mean solar time, Oort cloud, Mean sun, Waxing, Metonic cycle, Kuiper belt, Solar noon, Coronal mass ejection, New moon, Sunspot, Solar prominence, Analemma, Coronal hole, Planets , Apollo asteroid, Sun-synchronous orbit
The period of 22 years in which the Sun's magnetic field rotates a full 360 degrees, causing its poles to switch
Solar activity changes over a period of, on average, 11 years. At solar maximum, solar activity is high and so too the EUV radiation output which affects the ionosphere. At solar minimum, the opposite is true. A solar cycle commences at solar minimum.
Regular increase and decrease of sunspots and other solar activity, such as solar flares and CMEs, which are thought to be physically related. Sunspots go through one cycle of activity in approximately 11 years. The Sun's magnetic polarity reverses between every cycle.
The sun's activity changes over a period of about eleven years. At the solar maximum, the sun is very active and produces a lot of Ultraviolet (UV) radiation.
(or sunspot cycle)--an irregular cycle, averaging about 11 years in length, during which the number of sunspots (and of their associated outbursts) rises and then drops again. Like the sunspots, the cycle is probably magnetic in nature, and the polar magnetic field of the Sun also reverses each solar cycle.
A period of any 28 Julian Calendar years or of those Gregorian Calendar years during which every fourth has a 29-day February. (28 years is also the time required for all dates to occur again on the same day of the week. Example: Days of the week for all dates of years 2000 and 2028 will be identical.)
The 11-year variation in sunspot activity.
The solar cycle is the roughly 11-year, quasi-periodic variation in the frequency or number of sunspots, solar flares, and other solar activity.
An 11-year cycle during which the number of sunspots varies predictably. (TOP OF THE PAGE) (CLOSE WINDOW)
Activity on the Sun varies with a period, on average, of 11 years. The solar cycle is most evident through the number of sunspots present on the solar disk. At the start of new cycle there will be no or very few spots. Those that are present will be at high heliographic latitudes. As the cycle progresses, the number of spots increase and the latitude at which these spots appear reduces. The solar maximum will occur typically 3 to 5 years after solar minimum. The decline to minimum is longer than the rise to maximum. Sunspots with the largest areas tend to occur in the two years after solar maximum. At the end of the cycle, sunspots can be found close to the solar equator (together with high latitude spots from the new cycle).
The approximately 11-year quasi-periodic variation in frequency or number of sunspots, coronal mass ejections, solar flares, and other solar activity.
A predictable 11-year cycle when defined by solar activity, including the number of sunspots, flares, and CMEs, which follow this cycle. When defined by the solar magnetic field directions, the cycle is 22 years long.
Calendrical system based on solar year; typical of all civilizations; variations of solar calendars in Western civilization are Julian and Gregorian calendars; Mayas also constructed solar calendar. (p. 213)
The approximately 11-year, quasi-periodic variation in the frequency or number of solar active events.
The cyclical change, repeated about every 11 years, in the strength of the Sun's magnetic field, the number of sunspots and the number of particles emitted in the solar wind; see also "sunspot cycle."
The approximate 11-year pattern in the number of sunspots, coronal mass ejections (CME's), solar flares, and other solar activity. About every 11 years the Sun's magnetic field changes from north to south. Eleven years later it will flip back. People may have heard of this as the 22 Year Cycle since after two - 11 year cycles the Sun's magnetic field will be back the way it was at the start of the 22 years. Monthly Average Sunspot Number From 1750 to 2004. Notice the cyclic pattern in the data. Also notice that the pattern is almost a sine wave. This is the most common pattern in nature.
Most indicators of solar activity vary in a quasiperiodic manner, with successive maxima separated by an average interval of about 11 years - the so-called solar cycle. If reversal of the magnetic-field polarity in a given hemisphere in successive 11-year periods is taken into account, the complete solar cycle may be considered to average some 22 years.
The periodic changing of the Sun's magnetic field, which determines the number of sunspots and the amount of particles emitted in the solar wind. The period of the cycle is about 11 years.
The Schwabe solar cycle or Schwabe-Wolf cycle is the eleven-year cycle of solar activity of the sun. This 11-year cycle was first determined in 1843 by the German astronomer Heinrich Schwabe. Since 1849, it is based on the number of sunspots observed on the Sun.
The solar cycle is a 28-year cycle of the Julian calendar with respect to the week.