Òrùn

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Òrùn Sun symbol.svg
The Sun by the Atmospheric Imaging Assembly of NASA's Solar Dynamics Observatory - 20100819.jpg
Observation data
Mean distance
from Earth
1.496×108 km
8 min 19 s at light speed
Visual brightness (V) −26.74 [1]
Absolute magnitude 4.83 [1]
Spectral classification G2V
Metallicity Z = 0.0122[2]
Angular size 31.6′ – 32.7′ [3]
Adjectives solar
Orbital characteristics
Mean distance
from Milky Way core
~2.5×1017 km
26,000 light-years
Galactic period (2.25–2.50) × 108 a
Velocity ~220 km/s (orbit around the center of the Galaxy)
~20 km/s (relative to average velocity of other stars in stellar neighborhood)
~370 km/s[4] (relative to the cosmic microwave background)
Physical characteristics
Mean diameter 1.392×106 km [1]
109 × Earth
Equatorial radius 6.955×105 km [5]
109 × Earth[5]
Equatorial circumference 4.379×106 km [5]
109 × Earth[5]
Flattening 9×10−6
Surface area 6.0877×1012 km2 [5]
11,990 × Earth[5]
Volume 1.412×1018 km3 [5]
1,300,000 × Earth
Mass 1.9891×1030 kg[1]
333,000 × Earth[1]
Average density 1.408×103 kg/m3 [1][5][6]
Density Center (model): 1.622×105 kg/m3 [1]
Lower photosphere: 2×10−4 kg/m3
Lower chromosphere: 5×10−6 kg/m3
Corona (avg.): 1×10−12 kg/m3 [7]
Equatorial surface gravity 274.0 m/s2 [1]
27.94 g
28 × Earth[5]
Escape velocity
(from the surface)
617.7 km/s [5]
55 × Earth[5]
Temperature Center (modeled): ~1.57×107 K [1]
Photosphere (effective): 5,778 K [1]
Corona: ~5×106 K
Luminosity (Lsol) 3.846×1026 W [1]
~3.75×1028 lm
~98 lm/W efficacy
Mean Intensity (Isol) 2.009×107 W·m−2·sr−1
Rotation characteristics
Obliquity 7.25° [1]
(to the ecliptic)
67.23°
(to the galactic plane)
Right ascension
of North pole[8]
286.13°
19h 4min 30s
Declination
of North pole
+63.87°
63°52' North
Sidereal rotation period
(at equator)
25.05 days [1]
(at 16° latitude) 25.38 days [1]
25d 9h 7min 12s [8]
(at poles) 34.4 days [1]
Rotation velocity
(at equator)
7.189×103 km/h [5]
Photospheric composition (by mass)
Hydrogen 73.46%[9]
Helium 24.85%
Oxygen 0.77%
Carbon 0.29%
Iron 0.16%
Neon 0.12%
Nitrogen 0.09%
Silicon 0.07%
Magnesium 0.05%
Sulfur 0.04%
Oorun

Òòrùn ni ìràwọ̀ ti o wa ni arin Sistemu Orun. Ile-aye ati awon ohun miran (awon planeti yoku, onirawo, olokuta, okutaina ati eruku) won n yipo òòrùn, ti o se fun ra re nikan ni itobi 99.8% gbogbo eto oorun. Okun lati inu oorun gege bi ooruntitan n pese fun awon ohun elemi lona ti a mo si ikommolejo (photosynthesis), be ni orun lo n so bi igba ati oju-ojo se n ri.


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 Williams, D. R. (2004). "Sun Fact Sheet". NASA. http://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html. Retrieved 2010-09-27. 
  2. Asplund, M.; N. Grevesse and A. J. Sauval (2006). "The new solar abundances - Part I: the observations". Communications in Asteroseismology 147: 76–79. Bibcode 2006CoAst.147...76A. doi:10.1553/cia147s76. 
  3. "Eclipse 99: Frequently Asked Questions". NASA. http://education.gsfc.nasa.gov/eclipse/pages/faq.html. Retrieved 2010-10-24. 
  4. Hinshaw, G.; et al. (2009). "Five-year Wilkinson Microwave Anisotropy Probe observations: data processing, sky maps, and basic results". The Astrophysical Journal Supplement Series 118: 225–245. Bibcode 2009ApJS..180..225H. doi:10.1088/0067-0049/180/2/225. 
  5. 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 "Solar System Exploration: Planets: Sun: Facts & Figures". NASA. Archived from the original on 2008-01-02. http://web.archive.org/web/20080102034758/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Sun&Display=Facts&System=Metric. 
  6. Ko, M. (1999). "Density of the Sun". In Elert, G.. The Physics Factbook. http://hypertextbook.com/facts/1999/MayKo.shtml. 
  7. "Principles of Spectroscopy". University of Michigan, Astronomy Department. 30 August 2007. http://www.astro.lsa.umich.edu/undergrad/Labs/spectro/short_spectro.html. 
  8. 8.0 8.1 Seidelmann, P. K.; et al. (2000). "Report Of The IAU/IAG Working Group On Cartographic Coordinates And Rotational Elements Of The Planets And Satellites: 2000". http://www.hnsky.org/iau-iag.htm. Retrieved 2006-03-22. 
  9. "The Sun's Vital Statistics". Stanford Solar Center. http://solar-center.stanford.edu/vitalstats.html. Retrieved 2008-07-29. , citing Eddy, J. (1979). A New Sun: The Solar Results From Skylab. NASA. p. 37. NASA SP-402. http://history.nasa.gov/SP-402/contents.htm.