Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q332> ?p ?o }
- Q332 subject Q6392646.
- Q332 subject Q7034109.
- Q332 subject Q8273081.
- Q332 abstract "Neptune is the eighth and farthest known planet from the Sun. It is the fourth-largest planet by diameter and the third-largest by mass. Among the giant planets in the Solar System, Neptune is the most dense. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth and slightly larger than Neptune. Neptune orbits the Sun once every 164.8 years at an average distance of 30.1 astronomical units (4.50×109 km). Named after the Roman god of the sea, its astronomical symbol is ♆, a stylised version of the god Neptune's trident.Neptune is not visible to the unaided eye and is the only planet in the Solar System found thus far by mathematical prediction rather than by empirical observation. Unexpected changes in the orbit of Uranus led Alexis Bouvard to deduce that its orbit was subject to gravitational perturbation by an unknown planet. Neptune was subsequently observed with a telescope on 23 September 1846 by Johann Galle within a degree of the position predicted by Urbain Le Verrier. Its largest moon, Triton, was discovered shortly thereafter, though none of the planet's remaining known 14 moons were located telescopically until the 20th century. The planet's distance from Earth gives it a very small apparent size, making it challenging to study with Earth-based telescopes. Neptune was visited by Voyager 2, when it flew by the planet on 25 August 1989.Neptune is similar in composition to Uranus, and both have compositions that differ from those of the larger gas giants, Jupiter and Saturn. Neptune's atmosphere is composed primarily of hydrogen and helium, along with traces of hydrocarbons and possibly nitrogen; it contains a higher proportion of "ices" such as water, ammonia, and methane. Scientists sometimes categorise Uranus and Neptune as "ice giants" to emphasise this distinction. The interior of Neptune, like that of Uranus, is primarily composed of ices and rock. Traces of methane in the outermost regions in part account for the planet's blue appearance.In contrast to the hazy, relatively featureless atmosphere of Uranus, Neptune's atmosphere has active and visible weather patterns. For example, at the time of the Voyager 2 flyby in 1989, the planet's southern hemisphere had a Great Dark Spot comparable to the Great Red Spot on Jupiter. These weather patterns are driven by the strongest sustained winds of any planet in the Solar System, with recorded wind speeds as high as 2,100 kilometres per hour (580 m/s; 1,300 mph). Because of its great distance from the Sun, Neptune's outer atmosphere is one of the coldest places in the Solar System, with temperatures at its cloud tops approaching 55 K (−218 °C). Temperatures at the planet's centre are approximately 5,400 K (5,100 °C). Neptune has a faint and fragmented ring system (labelled "arcs"), which was first detected during the 1960s and confirmed by Voyager 2.".
- Q332 albedo "0.29".
- Q332 albedo "0.41".
- Q332 apparentMagnitude "8.02".
- Q332 averageSpeed "19548.0".
- Q332 discovered "1846-09-23".
- Q332 discoverer Q104154.
- Q332 discoverer Q76431.
- Q332 epoch "J2000".
- Q332 escapeVelocity "84600.0".
- Q332 meanTemperature "55.0".
- Q332 meanTemperature "72.0".
- Q332 orbitalPeriod "5.20069248E9".
- Q332 thumbnail Neptune_symbol.svg?width=300.
- Q332 volume "57.74".
- Q332 wikiPageExternalLink neptunefact.html.
- Q332 wikiPageExternalLink solarsystem.nasa.gov.
- Q332 wikiPageExternalLink profile.cfm?Object=Neptune.
- Q332 wikiPageExternalLink episode-63-neptune.
- Q332 wikiPageExternalLink neptune.html.
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