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Uranus ⛢ (♅)
Uranus as seen by NASA's Voyager 2 (remastered).png
Photograph of Uranus in true colour (by Voyager 2 in 1986)
Discovery
Discovered by[[{{#property:P61}}]]
Discovery dateError: Invalid time.
Designations
Pronunciation/jʊˈrnəs/ ( listen) or /ˈjʊərənəs/ ( listen)
Named after
the Latin form Ūranus of the Greek god Οὐρανός Ouranos
AdjectivesUranian (/jʊˈrniən/)
Orbital characteristics
Epoch J2000
Aphelion20.0965 AU (3006.39 Gm)
Perihelion18.2861 AU (2735.56 Gm)
19.19126 AU (2870.972 Gm)
Eccentricity0.04717
369.66 days
6.80 km/s
142.238600°
Inclination
74.006°
17–19 August 2050
96.998857°
Known satellites27
Physical characteristics
Mean radius
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 g
0.23 (estimate)
21.3 km/s
−0.71832 d
−17 h 14 m 23 s
(retrograde)
−0.71833 d
−17 h 14 min 24 s
(retrograde)
Equatorial rotation velocity
2.59 km/s
9,320 km/h
97.77° (to orbit)
North pole right ascension
17h 9m 15s
257.311°
North pole declination
−15.175°
Albedo0.300 (Bond)
0.488 (geom.)
Surface temp.minmeanmax
bar level76 K (−197.2 °C)
0.1 bar
(tropopause)
47 K53 K57 K
5.38 to 6.03
3.3″ to 4.1″
Atmosphere
27.7 km
Composition by volume(Below 1.3 bar)

Gases:

Ices:

Uranus is the seventh planet from the Sun in our Solar System. Like Neptune, it is an ice giant. It is the third largest planet in the solar system.

The planet is made of ice, gases and liquid metal. Its atmosphere contains hydrogen, helium and methane. The temperature on Uranus is −197 °C (−322.6 °F; 76.1 K) near the top of its atmosphere. Its small solid core (about 55% the mass of Earth) is probably about 5,000 K (4,730 °C; 8,540 °F; 5,000 K)[convert: %s]%s.

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Uranus & Neptune: Crash Course Astronomy #19

Uranus & Neptune: Crash Course Astronomy #19
Uranus 101 | National Geographic

Uranus 101 | National Geographic
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Voyager Sends Signals Again. New Horizons.

Voyager Sends Signals Again. New Horizons.
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