quiet Sun


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quiet Sun

The term applied to the Sun around the minimum of the sunspot cycle, when the absence of active regions allows relatively ‘quiet’ conditions to prevail. The Sun is not then free of all disturbance but there are few (if any) concentrations of intense magnetic flux to produce significant departures from a uniform distribution of radiative flux across the disk. Compare active Sun.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

quiet sun

[′kwī·ət ′sən]
(astrophysics)
The sun when it is free from unusual radio wave or thermal radiation such as that associated with sunspots.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
His credits include 'In the Heat of the Night', 'Castle Keep', 'Dead Man Walking', 'A Year in the Quiet Sun', which won the Golden Lion at the Venice Film Festival, and 'The Ninth Configuration', for which he received a Golden Globe nomination.
Darker regions, called coronal holes, are regions of the quiet Sun whose magnetic field lines are dragged out to the interplanetary space due to the solar wind (only one foot of the field line is rooted in the solar surface).
The values of the minima observed since 1949 provide information about the mean quiet Sun during the last period of approximately 55 years.
There's also a quiet sun terrace, where you can plonk yourselves down on one of the beanbag beds; the perfect place to wind down after a day of sightseeing.
Furthermore, different observations suggest that an important part of the magnetic flux in quiet Sun regions might be the result of the emergence of small-scale and short-lived magnetic loops (see [4] [5]) and that can also contribute to heating of the solar chromosphere and corona [6] [7].
Stuff like Arzachel, Quiet Sun, Curved Air, Matching Mole, King Crimson, Kevin Ayers etc.
NASA's recently launched Van Allen Probes, formerly known as the Radiation Belt Space Probes (December issue, page 12), have detected dramatic changes in the Van Allen belts around Earth despite a relatively quiet Sun, scientists announced at the American Geophysical Union.
The spectral flux density of the Sun [S.sup.f.sup.s] can be imagined as composed by two contributions: the first related to the quiet Sun [S.sub.f.sup.QS] and the second due to the radiation mechanism involved in flares [S.sub.f.sup.F].
The last few days of February into early March saw a fairly quiet Sun but by March 3, sunspot 1429 had appeared near the NE limb and rotated to near the Sun's central meridian by March 8.