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Uranus

Arthur Dayne

@arthurdayne

Information on the astronomical development, evolution and properties of Uranus, the seventh planet from the sun in the Milky Way.

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Hearts

Comments

Arthur Dayne

@arthurdayne

Information on the astronomical development, evolution and properties of Uranus, the seventh planet from the sun in the Milky Way.

Planet Uranus Facts - Planet Facts

Uranus is named after the Greek god of the sky. Uranus was the husband of Gaia, the goddess of the Earth. It was discovered in December 13, 1781 by William Herschel, a German-born British astronomer.
http://planetfacts.org/planet-uranus-facts/
Uranus Facts for Kids - Science Kids

Uranus likes to be a bit different. It shows off a majestic blue/green haze due to its high levels of methane gas and rolls like a barrel rather than spinning like Earth and the other planets in our Solar System.
http://www.sciencekids.co.nz/sciencefacts/planets/uranus.html
Fact Slides - Uranus

Uranus was originally called "George's Star" (Georgium Sidus).
http://www.factslides.com/s-Uranus
Kids Astronomy - Uranus

In astronomy mythology, Uranus was the lord of the skies and husband of Earth. He was also the king of the gods until he was overthrown by his son Saturn.
http://www.kidsastronomy.com/uranus.htm
Planets For Kids - Uranus

The seventh planet from the Sun, it was not known in ancient times, unlike the planets from Mercury to Saturn.
http://www.planetsforkids.org/planet-uranus.html
Ten Interesting Facts About Uranus - Universe Today

The gas (and ice) giant known as Uranus is a fascinating place. The seventh planet from out Sun, Uranus is the third-largest in terms of size, the fourth-largest in terms of mass, and one of the least dense objects in our Solar System.
http://www.universetoday.com/19279/10-interesting-facts-about-uranus/
The Planets - Uranus

Uranus, named after the the father of the Roman god Saturn, is the seventh planet in the Solar System and third of the gas giants. It is the third largest planet by diameter, yet fourth most massive.
http://theplanets.org/uranus/
Uranus - Views of the Solar System

Uranus is the seventh planet from the Sun. It was discovered by William Herschel in 1781. It has at least 21 moons. Uranus is composed mostly of hydrogen, helium, and methane. It is distinguished by the fact that it is tipped on its side.
http://solarviews.com/eng/uranus.htm
Uranus Information, Facts, News, Photos - National Geographic

Get information, facts, photos, news, videos, and more about planet Uranus from National Geographic.
http://science.nationalgeographic.com/science/space/solar-system/uranus-article
Uranus Facts: Interesting Facts about the Planet Uranus - Space Facts

Uranus is the seventh planet from the Sun. It's not visible to the naked eye, and became the first planet discovered with the use of a telescope. Uranus is tipped over on its side with an axial tilt of 98 degrees. It is often described as "rolling around the Sun on its side."
http://space-facts.com/uranus
Uranus, in Astronomy - Infoplease

Uranus in astronomy, 7th planet from the sun, at a mean distance of 1.78 billion mi, with an orbit lying between those of Saturn and Neptune.
http://www.infoplease.com/encyclopedia/science/uranus-astronomy.html
Uranus - Astronomy

Astronomy is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more.
http://www.astronomy.com/tags/uranus
Uranus (Astronomy) - Encyclopedia

Uranus was the first planet to be discovered that had not been known since antiquity. Although Uranus is just bright enough to be seen with the naked eye, and in fact had appeared in some early star charts as an unidentified star, English astronomer William Herschel was the first to recognize it as a planet in 1781.
http://www.encyclopedia.com/topic/Uranus_(astronomy).aspx
Uranus - Enchanted Learning

Uranus is the seventh planet from the sun in our solar system. This huge, icy planet is covered with clouds and is encircled by a belt of 11 rings and at least 22 moons.
http://www.enchantedlearning.com/subjects/astronomy/planets/uranus/
Solar System Exploration - NASA

Uranus is the only giant planet whose equator is nearly at right angles to its orbit. A collision with an Earth-sized object may explain the unique tilt. Nearly a twin in size to Neptune, Uranus has more methane in its mainly hydrogen and helium atmosphere than Jupiter or Saturn. Methane gives Uranus its blue tint.
http://solarsystem.nasa.gov/planets/uranus
Uranus: Educational Facts and History Of The Planet Uranus - Nine Planets

Careful pronunciation may be necessary to avoid embarrassment. Uranus is the seventh planet from the Sun and the third largest (by diameter). Uranus is larger in diameter but smaller in mass than Neptune.
http://nineplanets.org/uranus.html
Uranus - Wikipedia

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both have different bulk chemical composition from that of the larger gas giants Jupiter and Saturn.
https://en.wikipedia.org/wiki/Uranus

Comments

Uranus

Uranus in true colour, ^[a] as captured by Voyager 2. Its pale, muted appearance is due to a shroud of haze above its clouds

Discovery

Discovered by

William Herschel

Discovery date

13 March 1781

Designations

Pronunciation

/ˈjʊərənəs/ ^[1] or /jʊˈreɪnəs/ ^[2]

Named after

the Latin form Ūranus of the Greek god Οὐρανός Ouranos

Adjectives

Uranian (/jʊˈreɪniən/)^[3]

Symbol

Orbital characteristics^[4]^[b]

Epoch J2000

Aphelion

20.0965 AU (3.00639 billion km)

Perihelion

18.2861 AU (2.73556 billion km)

Semi-major axis

19.19126 AU (2.870972 billion km)

Eccentricity

0.04717

Orbital period (sidereal)

84.0205 yr
30,688.5 d^[5]
42,718 Uranian solar days^[6]

Orbital period (synodic)

369.66 days^[7]

Average orbital speed

6.80 km/s^[7]

Mean anomaly

142.238600°

Inclination

0.773° to ecliptic
6.48° to Sun's equator
0.99° to invariable plane^[8]

Longitude of ascending node

74.006°

Time of perihelion

17–19 August 2050^[9]^[10]

Argument of perihelion

96.998857°

Known satellites

Physical characteristics

Mean radius

25,362±7 km^[11]^[c]

Equatorial radius

25,559±4 km
4.007 Earths^[11]^[c]

Polar radius

24,973±20 km
3.929 Earths^[11]^[c]

Flattening

0.0229±0.0008^[d]

Circumference

159,354.1 km^[5]

Surface area

8.1156×10⁹ km²^[5]^[c]
15.91 Earths

Volume

6.833×10¹³ km³^[7]^[c]
63.086 Earths

Mass

(8.6810±0.0013)×10²⁵ kg
14.536 Earths^[12]
GM=5,793,939±13 km³/s²

Mean density

1.27 g/cm³^[7]^[e]

Surface gravity

8.69 m/s² (0.886 g₀)^[7]^[c]

Moment of inertia factor

0.23^[13] (estimate)

Escape velocity

21.3 km/s^[7]^[c]

Synodic rotation period

−0.718649 d
−17^h 14^m 51^s
(retrograde)

Sidereal rotation period

−0.718661 d
−17^h 14^m 52.310^s ± 0.036^s
(retrograde)^[14]

Equatorial rotation velocity

2.59 km/s

Axial tilt

82.23° (to orbit, retrograde).^[7] 97.77°(prograde, right-hand rule)

North pole right ascension

17^h 9^m 15^s
257.311°^[11]^[15]

North pole declination

−15.175°^[11]^[15]

Albedo

0.300 (Bond)^[16]
0.488 (geom.)^[17]

Surface temp.	min	mean	max
1 bar level^[18]		76 K (−197.2 °C)
0.1 bar (tropopause)^[19]	47 K	53 K	57 K

Apparent magnitude

5.38^[20] to 6.03^[20]

Absolute magnitude (H)

−7.2^[21]

Angular diameter

3.3″ to 4.1″^[7]

Atmosphere^[19]^[22]^[23]^[f]

Scale height

27.7 km^[7]

Composition by volume

Below 1.3 bar (130 kPa):

83 ± 3% hydrogen
15 ± 3% helium
2.3% methane
0.009% (0.007–0.015%) hydrogen deuteride
hydrogen sulfide (trace amount)

Icy volatiles:

Source : Wikipedia under CC-BY-SA license

Links
Media

Planet Uranus Facts - Planet Facts

Uranus is named after the Greek god of the sky. Uranus was the husband of Gaia, the goddess of the Earth. It was discovered in December 13, 1781 by William Herschel, a German-born British astronomer.
http://planetfacts.org/planet-uranus-facts/
Uranus Facts for Kids - Science Kids

Uranus likes to be a bit different. It shows off a majestic blue/green haze due to its high levels of methane gas and rolls like a barrel rather than spinning like Earth and the other planets in our Solar System.
http://www.sciencekids.co.nz/sciencefacts/planets/uranus.html
Fact Slides - Uranus

Uranus was originally called "George's Star" (Georgium Sidus).
http://www.factslides.com/s-Uranus
Kids Astronomy - Uranus

In astronomy mythology, Uranus was the lord of the skies and husband of Earth. He was also the king of the gods until he was overthrown by his son Saturn.
http://www.kidsastronomy.com/uranus.htm
Planets For Kids - Uranus

The seventh planet from the Sun, it was not known in ancient times, unlike the planets from Mercury to Saturn.
http://www.planetsforkids.org/planet-uranus.html
Ten Interesting Facts About Uranus - Universe Today

The gas (and ice) giant known as Uranus is a fascinating place. The seventh planet from out Sun, Uranus is the third-largest in terms of size, the fourth-largest in terms of mass, and one of the least dense objects in our Solar System.
http://www.universetoday.com/19279/10-interesting-facts-about-uranus/
The Planets - Uranus

Uranus, named after the the father of the Roman god Saturn, is the seventh planet in the Solar System and third of the gas giants. It is the third largest planet by diameter, yet fourth most massive.
http://theplanets.org/uranus/
Uranus - Views of the Solar System

Uranus is the seventh planet from the Sun. It was discovered by William Herschel in 1781. It has at least 21 moons. Uranus is composed mostly of hydrogen, helium, and methane. It is distinguished by the fact that it is tipped on its side.
http://solarviews.com/eng/uranus.htm
Uranus Information, Facts, News, Photos - National Geographic

Get information, facts, photos, news, videos, and more about planet Uranus from National Geographic.
http://science.nationalgeographic.com/science/space/solar-system/uranus-article
Uranus Facts: Interesting Facts about the Planet Uranus - Space Facts

Uranus is the seventh planet from the Sun. It's not visible to the naked eye, and became the first planet discovered with the use of a telescope. Uranus is tipped over on its side with an axial tilt of 98 degrees. It is often described as "rolling around the Sun on its side."
http://space-facts.com/uranus
Uranus, in Astronomy - Infoplease

Uranus in astronomy, 7th planet from the sun, at a mean distance of 1.78 billion mi, with an orbit lying between those of Saturn and Neptune.
http://www.infoplease.com/encyclopedia/science/uranus-astronomy.html
Uranus - Astronomy

Astronomy is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more.
http://www.astronomy.com/tags/uranus
Uranus (Astronomy) - Encyclopedia

Uranus was the first planet to be discovered that had not been known since antiquity. Although Uranus is just bright enough to be seen with the naked eye, and in fact had appeared in some early star charts as an unidentified star, English astronomer William Herschel was the first to recognize it as a planet in 1781.
http://www.encyclopedia.com/topic/Uranus_(astronomy).aspx
Uranus - Enchanted Learning

Uranus is the seventh planet from the sun in our solar system. This huge, icy planet is covered with clouds and is encircled by a belt of 11 rings and at least 22 moons.
http://www.enchantedlearning.com/subjects/astronomy/planets/uranus/
Solar System Exploration - NASA

Uranus is the only giant planet whose equator is nearly at right angles to its orbit. A collision with an Earth-sized object may explain the unique tilt. Nearly a twin in size to Neptune, Uranus has more methane in its mainly hydrogen and helium atmosphere than Jupiter or Saturn. Methane gives Uranus its blue tint.
http://solarsystem.nasa.gov/planets/uranus
Uranus: Educational Facts and History Of The Planet Uranus - Nine Planets

Careful pronunciation may be necessary to avoid embarrassment. Uranus is the seventh planet from the Sun and the third largest (by diameter). Uranus is larger in diameter but smaller in mass than Neptune.
http://nineplanets.org/uranus.html
Uranus - Wikipedia

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both have different bulk chemical composition from that of the larger gas giants Jupiter and Saturn.
https://en.wikipedia.org/wiki/Uranus