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When viewed against the background of space (off-limb), they are referred to as spicules; when viewed against the Sun's surface (on-disk), they are referred to as fibrils or mottles.
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in the Sun's surface, sound waves with a period of about five minutes that causes the Sun's surface to rise and fall at several hundred meters per second (see
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they appear elongated (if seen on the disk, they are known as "mottles" or "fibrils"). They are usually associated with regions of high
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and last a few minutes each before falling back to the solar atmosphere. They were discovered in 1877 by
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about 300 km in diameter. They move upwards with speeds between 15 and 110 km/s from the
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Please expand the section to include this information. Further details may exist on the
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Bose, Souvik; Jayant Joshi; Vasco
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Solar chromospheric spicules from the leakage of photospheric oscillations and flows
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Spicules near the solar limb. They appear as dark "hairs" above the solar surface.
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Quantifying
Spicules, Tiago M. D. Pereira, Bart De Pontieu, and Mats Carlsson,
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NASA Astronomy
Picture of the Day: Spicules: Jets on the Sun (2 November 2008)
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There are about 3,000,000 active spicules at any one time on the
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Freedman, Roger A.; Kaufmann III, William J. (2008).
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314:"Spicules and downflows in the solar chromosphere"
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181:. Unsourced material may be challenged and
67:Spicules last for about 15 minutes; at the
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201:Learn how and when to remove this message
124:about numerous other proposed mechanisms.
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16:Jet of plasma in the Sun's chromosphere
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179:adding citations to reliable sources
43:, is a dynamic jet of plasma in the
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958:Category:Missions to the Sun
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368:W. H. Freeman and Company
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797:In mythology and culture
230:University of Sheffield
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122:is missing information
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644:Coronal mass ejection
222:Palo Alto, California
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908:Standard solar model
878:Solar radio emission
696:List of solar cycles
175:improve this section
728:Magnetic switchback
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234:P-mode oscillations
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370:. pp.
63:Description
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893:Solar time
814:In culture
771:Heliopause
723:Solar wind
654:Prominence
546:Atmosphere
531:Tachocline
425:Literature
331:2101.07829
264:References
87:Prevalence
81:solar wind
69:solar limb
776:Bow shock
683:Variation
649:Nanoflare
444:0028-0836
162:does not
128:talk page
77:mass flux
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362:Universe
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785:Related
606:Spicule
578:Sunspot
573:Faculae
568:Granule
492:The Sun
436:Nature.
411:Bibcode
296:Bibcode
183:removed
168:sources
33:spicule
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103:Causes
41:mottle
37:fibril
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