[29] Pluto's astrological symbol resembles that of Neptune (), but has a circle in place of the middle prong of the trident (). After many such repetitions, Pluto is sufficiently slowed, and Neptune sufficiently sped up, that Pluto's orbit relative to Neptune drifts in the opposite direction until the process is reversed. A Scientific Conference and Educator Workshop", "Plutoid chosen as name for Solar System objects like Pluto", "Numerical evidence that the motion of Pluto is chaotic", "The 1:1 Superresonance in Pluto's Motion", "New Horizons Collects First Science on a Post-Pluto Object", "The analemma criterion: accidental quasi-satellites are indeed true quasi-satellites", Monthly Notices of the Royal Astronomical Society, University of Oregon Astronomy 121 Lecture notes, "Evidence for a Large-Scale Reorganization of Early Cambrian Continental Masses by Inertial Interchange True Polar Wander", "Surface Ices and the Atmospheric Composition of Pluto", "Near-infrared spectral monitoring of Pluto's ices: Spatial distribution and secular evolution", "Floating Mountains on Pluto – You Can't Make This Stuff Up", "Pluto and Charon with the Hubble Space Telescope: I. [14] Subsequent observations of Neptune in the late 19th century led astronomers to speculate that Uranus's orbit was being disturbed by another planet besides Neptune. The debate came to a head in August 2006, with an IAU resolution that created an official definition for the term "planet". This led the International Astronomical Union (IAU) in 2006 to formally define the term "planet" — excluding Pluto and reclassifying it as a dwarf planet. [80][79] There are several other resonances and interactions that enhance Pluto's stability. [157] A computer model created in 2004 by Alessandro Morbidelli of the Observatoire de la Côte d'Azur in Nice suggested that the migration of Neptune into the Kuiper belt may have been triggered by the formation of a 1:2 resonance between Jupiter and Saturn, which created a gravitational push that propelled both Uranus and Neptune into higher orbits and caused them to switch places, ultimately doubling Neptune's distance from the Sun. However, Pluto is also protected by its 2:3 orbital resonance with Neptune: for every two orbits that Pluto makes around the Sun, Neptune makes three. These masses would cause the body to reorient itself, leading to its unusual axial tilt of 120°. [150] It has been claimed that if Pluto were placed as near to the Sun as Earth, it would develop a tail, as comets do. [149] Like other Kuiper-belt objects (KBOs), Pluto shares features with comets; for example, the solar wind is gradually blowing Pluto's surface into space. Disregarding the often inconsistent technical details, they are whether a body acts like a planet (e.g. [162][163], Better maps were produced from images taken by the Hubble Space Telescope (HST), which offered higher resolution, and showed considerably more detail,[98] resolving variations several hundred kilometers across, including polar regions and large bright spots. New Horizons principal investigator Alan Stern has advocated for a Cassini-style orbiter that would launch around 2030 (the 100th anniversary of Pluto's discovery) and use Charon's gravity to adjust its orbit as needed to fulfill science objectives after arriving at the Pluto system. In order of distance from Pluto they are Styx, Nix, Kerberos, and Hydra. [25][27] Upon the announcement, Madan gave Venetia £5 (equivalent to 300 GBP, or 450 USD in 2014)[28] as a reward.[25]. With the new figures added in, the discrepancies, and with them the need for a Planet X, vanished. Fordi Pluto er så langt borte, har den ikke så stor innvirkning på livet ditt som en nærmere eller store planeter gjør. The same effect seen on Pluto would be observed on Earth were the Antarctic ice sheet several times larger.[93]. Du vil bli flink til å finne og løse problemer som andre kanskje ikke legger merke til. published findings regarding methane mixing ratios in Pluto's atmosphere consistent with a Plutonian diameter greater than 2360 km, with a "best guess" of 2368 km. [89][87][88], Pluto's rotation period, its day, is equal to 6.387 Earth days. For the deity, see, Dwarf planet in the Kuiper belt of the Solar System, Northern hemisphere of Pluto in true color, taken by NASA's, Orbit of Pluto – ecliptic view. Kommunikasjonsferdighetene dine vil være sterke i løpet av denne tiden. The presence of methane, a powerful greenhouse gas, in Pluto's atmosphere creates a temperature inversion, with the average temperature of its atmosphere tens of degrees warmer than its surface,[132] though observations by New Horizons have revealed Pluto's upper atmosphere to be far colder than expected (70 K, as opposed to about 100 K). The New Horizons science team summarized initial findings as "Pluto displays a surprisingly wide variety of geological landforms, including those resulting from glaciological and surface–atmosphere interactions as well as impact, tectonic, possible cryovolcanic, and mass-wasting processes. Pluto's orbit passes about 8 AU above that of Neptune, preventing a collision. The darker sections of both orbits show where they pass below the, Distribution of over 1000 craters of all ages in the northern anti-Charon quadrant of Pluto. [23] Constance Lowell proposed Zeus, then Percival and finally Constance. The final choice of name was helped in part by the fact that the first two letters of Pluto are the initials of Percival Lowell. Later images had slightly better resolution, due to minor improvements in Hubble instrumentation, but didn't reach quite as far south. [22] Lowell Observatory, which had the right to name the new object, received more than 1,000 suggestions from all over the world, ranging from Atlas to Zymal. Prøv imidlertid å bryte ut av sjenanse. . As Neptune migrated outward, it approached the objects in the proto-Kuiper belt, setting one in orbit around itself (Triton), locking others into resonances, and knocking others into chaotic orbits. The mean elements here are from the Theory of the Outer Planets (TOP2013) solution by the Institut de mécanique céleste et de calcul des éphémérides (IMCCE). Pluto er også et transneptunsk objekt. [171] The orbiter could then use Charon's gravity to leave the Pluto system and study more KBOs after all Pluto science objectives are completed. Pluto, en ganske liten planet, ble oppdaget i 1930. Pluto has been in Capricorn since January 24th, 2008, and will continue to roam in the earthy pragmatic sign until 2024 (note: it will exit Capricorn in 2023 but retrograde for some time). [19], Tombaugh's task was to systematically image the night sky in pairs of photographs, then examine each pair and determine whether any objects had shifted position. Observations of Pluto in occultation with Charon allowed scientists to establish Pluto's diameter more accurately, whereas the invention of adaptive optics allowed them to determine its shape more accurately.[124]. On July 29, 2005, astronomers at Caltech announced the discovery of a new trans-Neptunian object, Eris, which was substantially more massive than Pluto and the most massive object discovered in the Solar System since Triton in 1846. [106] Latest studies have shown that the surface has an age of 180000+90000−40000 years. [88] However, it is not agreed upon among astronomers whether Arawn should be classified as a quasi-satellite of Pluto based on this motion, since its orbit is primarily controlled by Neptune with only occasional smaller perturbations caused by Pluto.


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