"Giant planet A giant planet is any massive planet. They are usually primarily composed of low-boiling-point materials (gases or ices), rather than rock or other solid matter, but massive solid planets can also exist. There are four known giant planets in the Solar System: Jupiter, Saturn, Uranus and Neptune. Many extrasolar giant planets have been identified orbiting other stars. Giant planets are also sometimes called jovian planets, after Jupiter (""Jove"" being another name for the Roman god ""Jupiter""). They are also sometimes known as gas giants. However, many astronomers now apply the latter term only to Jupiter and Saturn, classifying"
"and originally called it ""Georgium Sidus"" (George's Star) in honour of King George III of the United Kingdom. French astronomers began calling it Herschel before German Johann Bode proposed the name Uranus, after the Greek god. The name ""Uranus"" did not come into common usage until around 1850. Starting in 1801, asteroids were discovered between Mars and Jupiter. The first few (Ceres, Pallas, Juno, Vesta) were initially considered planets. As more and more were discovered, they were soon stripped of their planetary status. On the other hand, Pluto was considered to be a planet at the time of its discovery"
"from John Keats's ""On First Looking Into Chapman's Homer"", are a reference to Herschel's discovery of Uranus. Many references to Uranus in English language popular culture and news involve humour about one pronunciation of its name resembling that of the phrase ""your anus"". Uranus Uranus (from the Latin name ""Ūranus"" for the Greek god Οὐρανός) 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 bulk chemical compositions which differ from that of the larger gas giants Jupiter and"
"sequence) between the orbits of Mars (12) and Jupiter (48). In his footnote, Titius declared ""But should the Lord Architect have left that space empty? Not at all."" When William Herschel discovered Uranus in 1781, the planet's orbit matched the law almost perfectly, leading astronomers to conclude that there had to be a planet between the orbits of Mars and Jupiter. On January 1, 1801, Giuseppe Piazzi, chair of astronomy at the University of Palermo, Sicily, found a tiny moving object in an orbit with exactly the radius predicted by this pattern. He dubbed it ""Ceres"", after the Roman goddess"
"lying just between the orbits of Saturn and Uranus in the Solar System. The planet is still glowing red hot. HR 8799 e is the innermost known planet as it orbits closer to its star than the other three known planets in this planetary system. This planet orbits at an estimated distance of 14.5 AU based on the relationship between angular separation measured by direct imaging observations and the star's distance from Earth. The estimated period of this planet if the orbit is face-on is about 50 years. A team of researchers led by Christian Marois at the National Research"
"by Jupiter. Neptune's equatorial radius of 24,764 km is nearly four times that of Earth. Neptune, like Uranus, is an ice giant, a subclass of giant planet, because they are smaller and have higher concentrations of volatiles than Jupiter and Saturn. In the search for extrasolar planets, Neptune has been used as a metonym: discovered bodies of similar mass are often referred to as ""Neptunes"", just as scientists refer to various extrasolar bodies as ""Jupiters"". Neptune's internal structure resembles that of Uranus. Its atmosphere forms about 5% to 10% of its mass and extends perhaps 10% to 20% of the"
"coastal borders of Brazil. A request for formal names will be submitted to the IAU at a later date. It has been speculated that 2060 Chiron may have a similar pair of rings. 10199 Chariklo 10199 Chariklo ( or ; ; provisional designation ) is the largest confirmed centaur (minor planet of the outer Solar System). It orbits the Sun between Saturn and Uranus, grazing the orbit of Uranus. On 26 March 2014, astronomers announced the discovery of two rings (nicknamed Oiapoque and Chuí) around Chariklo by observing a stellar occultation, making it the first minor planet known to have"
"2060 Chiron 2060 Chiron (), provisional designation , and also known as 95P/Chiron, is a small solar system body (or minor planet) in the outer Solar System, orbiting the Sun between Saturn and Uranus. Discovered in 1977 by Charles Kowal, it was the first-identified member of a new class of objects now known as centaurs—bodies orbiting between the asteroid belt and the Kuiper belt. Although it was initially called an asteroid and classified only as a minor planet with the designation ""2060 Chiron"", it was later found to exhibit behavior typical of a comet. Today it is classified as both"
"10199 Chariklo 10199 Chariklo ( or ; ; provisional designation ) is the largest confirmed centaur (minor planet of the outer Solar System). It orbits the Sun between Saturn and Uranus, grazing the orbit of Uranus. On 26 March 2014, astronomers announced the discovery of two rings (nicknamed Oiapoque and Chuí) around Chariklo by observing a stellar occultation, making it the first minor planet known to have rings. Chariklo was discovered by James V. Scotti of the Spacewatch program on February 15, 1997. Chariklo is named after the nymph Chariclo (""""), the wife of Chiron and the daughter of Apollo."
"not much is yet known about it. Generational planet In the field of astrology, generational planets are planets that affect an entire generation of people. The generational planets are the outer planets Uranus, Neptune, Pluto, Sedna, and Quaoar. Uranus was discovered by amateur astronomer William Herschel on 13 March 1781. Uranus exhibits the ideals of the 18th century, where people such as Benjamin Franklin endeavoured to use their inventive mind to move man into a more enlightened era. It has an orbit of 84 years, staying in each sign of the zodiac for approximately 7 years. Uranus is considered to"
"Oberon (moon) Oberon, also designated , is the outermost major moon of the planet Uranus. It is the second-largest and second most massive of the Uranian moons, and the ninth most massive moon in the Solar System. Discovered by William Herschel in 1787, Oberon is named after the mythical king of the fairies who appears as a character in Shakespeare's ""A Midsummer Night's Dream"". Its orbit lies partially outside Uranus's magnetosphere. It is likely that Oberon formed from the accretion disk that surrounded Uranus just after the planet's formation. The moon consists of approximately equal amounts of ice and rock,"
"between Saturn and Uranus in the outer Solar System. Forecasts had shown that, as seen from South America, it would pass in front of the 12.4-magnitude star UCAC4 248-108672, located in the constellation Scorpius, on 3 June 2013. With the aid of thirteen telescopes located in Argentina, Brazil, Chile, and Uruguay, a team of astronomers led by Felipe Braga Ribas (), a post-doctoral astronomer of the National Observatory (ON), in Rio de Janeiro, and 65 other researchers from 34 institutions in 12 countries, was able to observe this occultation event, a phenomenon during which a star disappears behind its occulting"
"Vulcan (hypothetical planet) Vulcan is a small hypothetical planet that was proposed to exist in an orbit between Mercury and the Sun. Attempting to explain peculiarities of Mercury's orbit, the 19th-century French mathematician Urbain Le Verrier hypothesized that they were the result of another planet, which he named ""Vulcan"". A number of reputable investigators became involved in the search for Vulcan, and despite occasional claimed observations, no such planet was ever confirmed. Peculiarities in Mercury's orbit have now been explained by Albert Einstein's theory of general relativity. Searches of data gathered by NASA's two ""STEREO"" spacecraft have failed to find"
"Generational planet In the field of astrology, generational planets are planets that affect an entire generation of people. The generational planets are the outer planets Uranus, Neptune, Pluto, Sedna, and Quaoar. Uranus was discovered by amateur astronomer William Herschel on 13 March 1781. Uranus exhibits the ideals of the 18th century, where people such as Benjamin Franklin endeavoured to use their inventive mind to move man into a more enlightened era. It has an orbit of 84 years, staying in each sign of the zodiac for approximately 7 years. Uranus is considered to be a higher octave of Mercury, which"
"rare and only occur around equinoxes, as the moon's orbital plane about Uranus is tilted 98° to Uranus's orbital plane about the Sun. Another transit, in 2008, was recorded by the European Southern Observatory. Ariel (moon) Ariel is the fourth-largest of the 27 known moons of Uranus. Ariel orbits and rotates in the equatorial plane of Uranus, which is almost perpendicular to the orbit of Uranus and so has an extreme seasonal cycle. It was discovered in October 1851 by William Lassell and named for a character in two different pieces of literature. As of 2017, much of the detailed"
"Mars and Jupiter. Kepler had already noticed the gap between Mars and Jupiter in 1596. Bode based his idea on the Titius–Bode law which is a now-discredited hypothesis that was first proposed in 1766. Bode observed that there was a regular pattern in the semi-major axes of the orbits of known planets, and that the pattern was marred only by the large gap between Mars and Jupiter. The pattern predicted that the missing planet ought to have an orbit with a semi-major axis near 2.8 astronomical units (AU). William Herschel's discovery of Uranus in 1781 near the predicted distance for"
"Puck (moon) Puck ( ) is an inner moon of Uranus. It was discovered in December 1985 by the ""Voyager 2"" spacecraft. The name ""Puck"" follows the convention of naming Uranus's moons after characters from Shakespeare. The orbit of Puck lies between the rings of Uranus and the first of Uranus's large moons, Miranda. Puck is approximately spherical in shape and has diameter of about 162 km. It has a dark, heavily cratered surface, which shows spectral signs of water ice. Puck—the largest inner moon of Uranus—was discovered from the images taken by ""Voyager 2"" on 30 December 1985. It"
"accepted by most astrologers. Uranus () is the ruling planet of Aquarius and is exalted in Scorpio. In classical Greek mythology, Uranus is the personification of the sky. The planet Uranus is very unusual among the planets in that it rotates on its side, so that it presents each of its poles to the Sun in turn during its orbit; causing both hemispheres to alternate between being bathed in light and lying in total darkness over the course of the orbit. Uranus takes 84 years to orbit the Sun, spending about 7 years in each sign of the zodiac. Uranus"
"perturbations of the orbit of Uranus. On-going mutual perturbations of the planets cause long-term quasi-periodic variations in their orbital elements, most apparent when two planets' orbital periods are nearly in sync. For instance, five orbits of Jupiter (59.31 years) is nearly equal to two of Saturn (58.91 years). This causes large perturbations of both, with a period of 918 years, the time required for the small difference in their positions at conjunction to make one complete circle, first discovered by Laplace. Venus currently has the orbit with the least eccentricity, i.e. it is the closest to circular, of all the"
"largest of Uranus's satellites, Titania, has a radius of only , or less than half that of the Moon, but slightly more than Rhea, the second-largest satellite of Saturn, making Titania the eighth-largest moon in the Solar System. Uranus's satellites have relatively low albedos; ranging from 0.20 for Umbriel to 0.35 for Ariel (in green light). They are ice–rock conglomerates composed of roughly 50% ice and 50% rock. The ice may include ammonia and carbon dioxide. Among the Uranian satellites, Ariel appears to have the youngest surface with the fewest impact craters and Umbriel's the oldest. Miranda has fault canyons"
"2.4 star. Uranus also has a southern polar star, 15 Orionis, an unremarkable magnitude 4.8 star. Both are fainter than Earth's Polaris (α Ursae Minoris), although Sabik only slightly. Uranus is unusual in that the obliquity of its ecliptic is 82° (angle between the orbital and rotational poles). The North Pole of Uranus points to somewhere near η Ophiuchi (in Earth's ""southern"" celestial hemisphere), about 15° northeast of Antares, and its South Pole halfway between Betelgeuse and Aldebaran. Uranus's ""tropics"" lie at 82° latitude and its ""Arctic circles"" at 8° latitude. On December 17, 2007, the Sun passed the Uranian"
"916 America 916 America is a minor planet orbiting the Sun in the main belt between Mars and Jupiter. It was discovered on 7 August 1915 by the Russian astronomer Grigory Nikolaevich Neujmin at Simeis, Russian Empire. Originally designated 916I, it was renamed '916 America' on 24 February 1923 after the Council of Astronomers at Pulkovo Observatory decided to commemorate ""the friendly relations of the astronomical observatories and astronomers"". Another possible reason for the name was as a mark of appreciation for the help given during the 1921 Russian famine by the American Relief Administration under the later President Herbert"
"quadrangles. They are named after the first craters whose names the IAU approved in July 2015. The map image(s) were taken by the ""Dawn"" space probe. Ceres (dwarf planet) Ceres (; minor-planet designation: 1 Ceres) is the largest object in the asteroid belt that lies between the orbits of Mars and Jupiter, slightly closer to Mars' orbit. With a diameter of , Ceres is the largest of the minor planets, and the only dwarf planet, inside Neptune's orbit. It is the 33rd-largest known body in the Solar System. Ceres is composed of rock and ice and is estimated to comprise"
"the majority of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed mostly of substances with relatively high melting points compared with hydrogen and helium, called volatiles, such as water, ammonia and methane. All eight planets have almost circular orbits that"
"notes Citations Sources Puck (moon) Puck ( ) is an inner moon of Uranus. It was discovered in December 1985 by the ""Voyager 2"" spacecraft. The name ""Puck"" follows the convention of naming Uranus's moons after characters from Shakespeare. The orbit of Puck lies between the rings of Uranus and the first of Uranus's large moons, Miranda. Puck is approximately spherical in shape and has diameter of about 162 km. It has a dark, heavily cratered surface, which shows spectral signs of water ice. Puck—the largest inner moon of Uranus—was discovered from the images taken by ""Voyager 2"" on 30"
"discovery of new planets, and indeed the discovery of Uranus and Ceres, both of whose distances fit well with the law, contributed to the law's fame. Neptune's distance was very discrepant, however, and indeed Pluto—now discredited as a planet—is at a mean distance that roughly corresponds to that the Titus-Bode law predicted for the next planet out from Uranus. When originally published, the law was approximately satisfied by all the known planets—Mercury through Saturn—with a gap between the fourth and fifth planets. It was regarded as interesting, but of no great importance until the discovery of Uranus in 1781, which"
"Mini-Neptune A mini-Neptune or sub-Neptune (sometimes known as a gas dwarf or transitional planet) is a planet of up to 10 Earth masses (), less massive than Uranus and Neptune, which have about 14.5 and 17 , respectively. Mini-Neptunes have thick hydrogen–helium atmospheres, probably with deep layers of ice, rock or liquid oceans (made of water, ammonia, a mixture of both, or heavier volatiles). Theoretical studies of such planets are loosely based on knowledge about Uranus and Neptune. Without a thick atmosphere, it would be classified as an ocean planet instead. An estimated dividing line between a rocky planet and"
"the term only for the planets similar to the latter two. With this terminology in mind, some astronomers have started referring to Uranus and Neptune as ice giants to indicate the predominance of the ""ices"" (in fluid form) in their interior composition. The alternative term ""jovian planet"" refers to the Roman god Jupiter—the genitive form of which is ""Jovis"", hence ""Jovian""—and was intended to indicate that all of these planets were similar to Jupiter. Objects large enough to start deuterium fusion (above 13 Jupiter masses for solar composition) are called brown dwarfs, and these occupy the mass range between that"
"figure Uranus. Tarnas associates the astrological planet Uranus with freedom and change, while Pluto is associated with evolution, instinct, and ""eros"". Thus in Tarnas's theory, the apparent relationships (conjunctions, oppositions, and squares) of Uranus and Pluto have momentous potential for human history. (Tarnas's research has not found significant correlation between the zodiac signs and human events.) Tarnas further observed that a Uranus-Pluto opposition occurred during the French Revolution. Like the 1960s, the French Revolution featured the characteristics of Uranus-Pluto alignment: revolution through the manifestation of the suppressed. These historical-astrological coincidences or synchronicities led Tarnas to further explore the relationship of"
"patterns, as well as some of the larger satellites, such as Titania and Oberon, may be visible. Uranus's mass is roughly 14.5 times that of Earth, making it the least massive of the giant planets. Its diameter is slightly larger than Neptune's at roughly four times that of Earth. A resulting density of 1.27 g/cm makes Uranus the second least dense planet, after Saturn. This value indicates that it is made primarily of various ices, such as water, ammonia, and methane. The total mass of ice in Uranus's interior is not precisely known, because different figures emerge depending on the"
"Ursula (crater) Ursula is a large crater on Uranus's moon Titania. It is about 135 km across, and is cut by Belmont Chasma. It is named after Hero's attendant in William Shakespeare's comedy Much Ado About Nothing. Ursula has a central pit with diameter of about 20 km. It is probably one of the youngest large impact craters on Titania. The crater is surrounded by smooth plains, which have the lowest impact crater density of all geological units on the moon, although they are cut by Belmont Chasma. The plains may be impact deposits (ejecta) associated with Ursula or they"
"heritage and descend to 1–5 atmospheres. The ESA evaluated a ""medium-class"" mission called Uranus Pathfinder. A New Frontiers Uranus Orbiter has been evaluated and recommended in the study, ""The Case for a Uranus Orbiter"". Such a mission is aided by the ease with which a relatively big mass can be sent to the systemover 1500 kg with an Atlas 521 and 12-year journey. For more concepts see Proposed Uranus missions. In astrology, the planet Uranus () is the ruling planet of Aquarius. Because Uranus is cyan and Uranus is associated with electricity, the colour electric blue, which is close to"
"Juliet. At the Voyager 2 images Juliet appears as an elongated object, the major axis pointing towards Uranus. The ratio of axes of Juliet's prolate spheroid is 0.5 ± 0.3, which is rather an extreme value. Its surface is grey in color. Juliet may collide with Desdemona within the next 100 million years. Explanatory notes Citations Juliet (moon) Juliet ( , ) is an inner satellite of Uranus. It was discovered from the images taken by ""Voyager 2"" on 3 January 1986, and was given the temporary designation S/1986 U 2. It is named after the heroine of William Shakespeare's"