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Arungrah

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Arungrah
Uranus, sachchaa rang me, jiske Voyager 2 utaaris rahaa. Iske pale,
muted appearance ke kaaran hae iske baadal ke uppar ke haze.
Discovery
Discovered byWilliam Herschel
Designations
Named after
the Latin form Ūranus of the Greek god
Οὐρανός Ouranos
Symbol⛢, ♅
Orbital characteristics
Epoch J2000
Aphelion20.0965 AU (3.00639 billion km)
Perihelion18.2861 AU (2.73556 billion km)
19.19126 AU (2.870972 billion km)
Eccentricity0.04717
369.66 days
6.80 km/s
142.238600°
Inclination
74.006°
17–19 August 2050[1][2]
96.998857°
Known satellites28
Physical characteristics
25,362±7 km
Equatorial radius
25,559±4 km
4.007 Earths
Polar radius
24,973±20 km
3.929 Earths
Flattening0.0229±0.0008
Circumference159,354.1 km
8.1156×109 km2
15.91 Earths
Volume6.833×1013 km3
63.086 Earths
Mass(8.6810±0.0013)×1025 kg
14.536 Earths
GM=5,793,939±13 km3/s2
Mean density
1.27 g/cm3
8.69 m/s2 (0.886 g0)[3] (estimate)
21.3 km/s
−0.718649 d
17h 14m 51s
(retrograde)
−0.718661 d
17h 14m 52.310s ± 0.036s
(retrograde)
Equatorial rotation velocity
2.59 km/s
82.23° (to orbit, retrograde).
97.77°(prograde, right-hand rule)
North pole right ascension
17h 9m 15s
257.311°[4]
North pole declination
−15.175°[4]
Albedo0.300 (Bond)
0.488 (geom.)
Surface temp. min mean max
bar level 76 K
(−197.2 °C)
0.1 bar
(tropopause)
47 K 53 K 57 K
5.38 to 6.03
−7.2[5]
3.3″ to 4.1″
Atmosphere
27.7 km
Composition by volumeBelow 1.3 bar (130 kPa):
Icy volatiles:

Arungrah (pratiik: ⛢, Uranus), Saur Mandal me suraj se duur 7th planet hae. Ii gaseous cyan-rang ke gas giant hae. Ii grah ke jaada hissa paani, ammonia, aur methane se banaa hae, jon supercritical phase of matter me hae, jiske taara vigyan "ice" nai to volatiles bole hae. Ii grah ke atmosphere complex layered baadal ke structure hae aur iske lowest minimum temperature (49 K (−224 °C; −371 °F)) saur mandal ke grah me se sab se kamti hae. Iske 82.23° ke axial tilt hae aur ii har 17 hours and 14 minutes me ek dafe rotate hoe hae. Iske matlab hae ki 84-Earth-year ke orbital period me Suraj ke parikarma karte, iske 42 saal ke continuous ghaam, aur iske baad by 42 saal of continuous andhera mile hae.

Saur mandal ke grah me se Arungrah ke diameter 3rd sab se barraa hae aur mass 4th sab se barraa hae. Volatile layer ke bittar ek patthar ke core hae, aur iske around ek hydrogen aur helium ke atmosphere hae. Thorraa hydrocarbon, carbon monoxide aur carbon dioxide ke upper atmosphere me paawa gais hae. Arungrah me dher unexplained mausam ke phenomena hae, jaise ki iske sab se jaada hawaa ke gati 900 km/h (560 mph), polar cap me badlao, aur iske erratic cloud formation. Ii grah ke internal heat bahit kamtii hae agar iske duusra giant planets se compare karaa jaae tab, aur ii kaise hoe hae clear nai hae.

Duusra giant planets ke rakam, Arungrah ke lage rings hae, ek magnetosphere hae, aur dher natural satellites hae. Ii bahut dark ring system khaali 2% incoming light ke reflect kare hae. Arungrah ke 28 natural satellites me 18 jaana jaae waala chandarma hae, jisme se 13 chhota-chhota inner moon hae. Aur jaada duur pe aur barraa paanch major moons hae: Miranda, Ariel, Umbriel, Titania, aur Oberon. Arungrah se aur jaada duur me 10 jaana jaae waala irregular moons hae. Ii grah ke magnetosphere ekdam asymmetric hae aur isme charged particles hae, jiske kaaran iske rings aur chandarma dark rahe hae.

Arungrah ke bina durbiin ke dekha jaae sake hae, lekin ii bahut dim hae aur iske khaali 1781 me ek grah ke classify karaa gais rahaa, jab iske pahila dafe William Herschell dekhis rahaa. Iske paae jaae ke 70 saal baad, ii maana gais rahaa ki iske namm Greek deotaa, Uranus ke naam dewa jaae. 2025 talak iske khaali ek dafe Voyager 2 visit karis rahaa jab uu iske bagal se urris rahaa.[6] Aaj-kal iske achchhaa se telescope se dekha jaae sake hae. Ii grah ke bagal se fir se urre ke plan karaa jaae hae.[7]

  1. Jean Meeus, Astronomical Algorithms (Richmond, Virginia: Willmann-Bell, 1998) p271. Bretagnon's complete VSOP87 model. It gives the 17th @ 18.283075301au. http://vo.imcce.fr/webservices/miriade/?forms Archived 7 Saptambar 2021 at the Wayback Machine IMCCE Observatoire de Paris / CNRS Calculated for a series of dates, five or ten days apart, in August 2050, using an interpolation formula from Astronomical Algorithms. Perihelion came very early on the 17th. INPOP planetary theory
  2. "HORIZONS Planet-center Batch call for August 2050 Perihelion". ssd.jpl.nasa.gov (Perihelion for Uranus planet-center (799) occurs on 2050-Aug-19 at 18.28307512au during a rdot flip from negative to positive). NASA/JPL. Archived from the original on 7 September 2021. Retrieved 7 September 2021.
  3. de Pater, Imke; Lissauer, Jack J. (2015). Planetary Sciences (2nd updated ed.). New York: Cambridge University Press. p. 250. ISBN 978-0521853712. https://books.google.com/books?id=stFpBgAAQBAJ&pg=PA250. Retrieved 17 August 2016.
  4. 4.0 4.1 Archinal, B. A.; Acton, C. H.; A'Hearn, M. F.; Conrad, A.; Consolmagno, G. J.; Duxbury, T.; Hestroffer, D.; Hilton, J. L. et al. (2018). "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015" (in en). Celestial Mechanics and Dynamical Astronomy 130 (3): 22. doi:10.1007/s10569-017-9805-5. ISSN 0923-2958. http://link.springer.com/10.1007/s10569-017-9805-5.
  5. "Encyclopedia - the brightest bodies". IMCCE. Archived from the original on 24 July 2023. Retrieved 29 May 2023.
  6. "Exploration | Uranus". NASA Solar System Exploration. 10 November 2017. Archived from the original on 7 August 2020. Retrieved 8 February 2020. Jan. 24, 1986: NASA's Voyager 2 made the first - and so far the only - visit to Uranus.
  7. "China's plans for outer Solar System exploration", The Planetary Society, 21 December 2023. (in en)