", Brightness Difference on 2005-05-15: (5th root of 100) ^ (Nix. Sélectionnez la section dans laquelle vous souhaitez faire votre recherche. [12] The rotation period has actually increased by 10% since Nix was discovered. Nous utilisons des cookies et des outils similaires pour faciliter vos achats, fournir nos services, pour comprendre comment les clients utilisent nos services afin de pouvoir apporter des améliorations, et pour présenter des annonces. Bill Dunford. It was imaged along with Pluto and its other moons by the New Horizons spacecraft as it flew by the Pluto system in July 2015. Nix has an orbital period of approximately 24.8546 days and its orbit is resonant with other moons of Pluto. Kristen Erickson [7], Early research appeared to show that Nix was reddish like Pluto and unlike the other moons,[1] but more recent reports have been that it is grey like the remaining moons.[4]. [4] In the discovery image, Nix is 6,300 times fainter than Pluto. [3], Early research appeared to show that the surface of Nix is reddish in color. [7][9] A hypothesis explaining such a near-resonance is that it originated before the outward migration of Charon following the formation of all five known moons, and is maintained by the periodic local fluctuation of 9% in the Pluto–Charon gravitational field strength. Planetary scientist Geronimo Villanueva created the sunset simulations while building a tool for a possible mission to Uranus. b Relative to Pluto's equator (also Charon's orbital plane).
À la place, notre système tient compte de facteurs tels que l'ancienneté d'un commentaire et si le commentateur a acheté l'article sur Amazon. The discovery images were taken on May 15, 2005 and May 18, 2005; the moons were independently found by Max J. Mutchler on June 15, 2005 and Andrew J. Steffl on August 15, 2005. Its orbital period of 24.9 days is also close to a 1:4 orbital resonance with Charon, but the timing discrepancy is 2.8%; there is no active resonance. A pair of small moons orbiting Pluto, which were discovered by NASA’s Hubble Space Telescope, have been named Nix and Hydra. Nix is a non-spherical moon of Pluto.It was found along with Hydra in June 2005 by the Hubble Space Telescope Pluto Companion Search Team, composed of Hal A. Weaver, S. Alan Stern, Max J. Mutchler, Andrew J. Steffl, Marc W. Buie, William J. Merline, John R. Spencer, Eliot F. Young, and Leslie A. Nix's orbital period is close to a 1:4 orbital resonance with Charon, with a timing discrepancy of 2.8%; there is no active resonance. NASA's next giant leap may be aided by tiny lunar robots that would help scout the lunar surface. [13], The discovery images were taken on 15 May 2005 and 18 May 2005. Écoutez de la musique en streaming sans publicité ou achetez des CDs et MP3 maintenant sur Amazon.fr. Nix is a natural satellite of Pluto, with a diameter of 49.8 km (30.9 mi) across its longest dimension. [20] Due to the chaotic rotation of Nix, it can occasionally flip its entire rotational axis. [2][30] As a result of this "Laplace-like" 3-body resonance, it has conjunctions with Styx and Hydra in a 2:3 ratio. [13], The highest-resolution image of Nix, taken by, Generally listed in increasing distance from Pluto. [10][11] At the time of New Horizon's flyby, Nix was rotating with a period of 43.9 hours retrograde to Pluto's equator with an inclination of 132 degrees — in other words it is rotating "backwards" in relation to its orbit around Pluto. The discovery images were taken on 15 May 2005 and 18 May 2005. There also will be a partial penumbral eclipse of the Moon. Nix and Hydra are roughly 20 to 70 miles (32 to 113 km) wide. Young.. By using this site, you agree to the Terms of Use Privacy Policy. Nix is a non-spherical moon of Pluto. Newly discovered dunes on Pluto tell us the dwarf planet’s geology and atmosphere is far more dynamic than previously expected. Young (23 February 2006). Nix is the inner of the two moons discovered orbiting Pluto in 2005. H. A. Weaver; S. A. Stern, M. J. Mutchler, A. J. Steffl, M. W. Buie, W. J. Merline, J. R. Spencer, E. F. Young and L. A.
“It’s clear,” says Jeffery Moore, New Horizons’ geology team lead, “Pluto is one of the most amazing and complex objects in our solar system.”. NASA has taken the next steps toward building Space Launch System (SLS) solid rocket boosters for as many as six additional flights. It was discovered along with Hydra (Pluto's outermost satellite) in June 2005. [24] Enhanced color images from the Ralph MVIC instrument of New Horizons show a reddish region on its surface. Russian Никта Nikta). It is not to be confused with the asteroid, LORRI and MVIC color composite image of Nix, The instantaneous force in the Pluto–Charon–Nix alignment case is 9.46% larger than in the quadrature case (where Nix is 90° from the Pluto–Charon axis); the Charon–Pluto–Nix case is almost exactly halfway between these values. [23], The water ice present on the surface of Nix is responsible for its high reflectivity. Early research appeared to show that Nix was reddish like Pluto and unlike the other moons,[9] but more-recent reports have been that it is grey like the remaining satellites. Some content of the original page may have been edited to make it more suitable for younger readers, unless otherwise noted. [21], Nix has an elongated shape, with its longest axis measured at 49.8 km (30.9 mi) across and its shortest axis 31.1 km (19.3 mi) across. [11], Nix was discovered by researchers of the Pluto Companion Search Team, using the Hubble Space Telescope. [25][23], Nix is not tidally locked and tumbles chaotically similarly to all smaller moons of Pluto; the moon's axial tilt and rotation period vary greatly over short timescales. Didymos B is getting an official name of its own: Dimorphos. Template:Infobox planet. This gives Nix the measured dimensions of 49.8 km × 33.2 km × 31.1 km (30.9 mi × 20.6 mi × 19.3 mi). Veuillez réessayer. [2], Nix was found by the Hubble Space Telescope Pluto Companion Search Team, composed of Hal A. Weaver, Alan Stern, Max J. Mutchler, Andrew J. Steffl, Marc W. Buie, William J. Merline, John R. Spencer, Eliot F. Young, and Leslie A. Nix and Hydra are roughly 5,000 times fainter than Pluto and are about two to three times farther from Pluto than its large moon, Charon, which was discovered in 1978.
Site Manager: The path through the solar system is a rocky road. Legendary explorers and visionaries, real and fictitious, are among those immortalized in the first set of official surface-feature names for Pluto's largest moon, Charon. [16] Detailed images of the moon have revealed at least 6 impact craters on it, the largest of which is about 15 km across. The moons were designated S/2005 P 1 (Hydra) and S/2005 P 2 (Nix).[5][6]. [2] Nix is slightly fainter than Hydra, suggesting that it is somewhat smaller in size. [10] In this case, tholins on the surface of Nix may have originated from the reaction of methane with ultraviolet radiation from the Sun. In accordance with IAU guidelines concerning the naming of satellites in the Solar System, the moon was named Nix. [notes 1], The New Horizons spacecraft visited the Pluto system and photographed Pluto and its moons during its flyby on 14 July 2015. [18], Pluto's smaller moons, including Nix, were thought to have formed from debris ejected from a massive collision between Pluto and another Kuiper belt object, similarly to how the Moon is believed to have formed from debris ejected by a large collision of Earth. [6] It is in a 3:2 orbital resonance with Hydra, and a 9:11 resonance with Styx (the ratios represent numbers of orbits completed per unit time; the period ratios are the inverses). [24] From those images, another accurate measurement of Nix's dimensions was made, giving the approximate dimensions of 42 km × 36 km (26 mi × 22 mi). [3][4], The formal name "Nix", from the Greek goddess of darkness and night and mother of Charon (ferryman of Hades), was announced on 21 June 2006 on IAU Circular 8723,[3] where the designation Pluto II is also given. Of Pluto's smaller moons, only Nix and Hydra were imaged at resolutions high enough for surface features to be visible. The names of features on the bodies in the Pluto system are related to mythology and the literature and history of exploration. Quite a few candles have been lit since NASA was born on Oct. 1, 1958. Take your favorite fandoms with you and never miss a beat. Nix is a natural satellite of Pluto. Nix is a non-spherical moon of Pluto. Nix isn’t very large, and there is a very fine line between an impact that will make a crater that big and one that will break Nix apart. [11], Early research appeared to show that Nix was reddish like Pluto and unlike the other moons,[12] but more recent reports have been that it is grey like the remaining moons.[7]. [4] All of Pluto's moons including Nix have very circular orbits that are coplanar to Charon's orbit; the moons of Pluto have very low orbital inclinations to Pluto's equator. This page was last changed on 8 March 2013, at 23:57. National Aeronautics and Space Administration Wiki, Pages containing cite templates with deprecated parameters, http://www.universetoday.com/13905/plutos-moon-nix/, "Pluto's Moons Raise New Puzzles for NASA's New Horizons Mission", http://www.nbcnews.com/science/space/plutos-moons-raise-new-puzzles-nasas-new-horizons-mission-n368741, "NASA’s Hubble Finds Pluto’s Moons Tumbling in Absolute Chaos", https://www.nasa.gov/press-release/nasa-s-hubble-finds-pluto-s-moons-tumbling-in-absolute-chaos, "DPS 2015: Pluto's small moons Styx, Nix, Kerberos, and Hydra", http://www.planetary.org/blogs/emily-lakdawalla/2015/dps15-1110-small-moons.html, http://www.nasa.gov/feature/how-big-is-pluto-new-horizons-settles-decades-long-debate/, Background Information Regarding Our Two Newly Discovered Satellites of Pluto, NASA's Hubble Reveals Possible New Moons Around Pluto, https://nasa.fandom.com/wiki/Nix_(moon)?oldid=23919. Nix is to be visited along with Pluto by the New Horizons mission in 2015. [7][8] As a result of this "Laplace-like" 3-body resonance, it has conjunctions with Styx and Hydra in a 2:3 ratio. The discoveries were announced on October 31, 2005, after confirmation from photographs archived in 2002. However, there were no significant color variations on other impact craters on Nix.
Nix was discovered in June 2005 by Hal Weaver and a large team of astronomers using the Hubble Space Telescope. Before its size was directly measured, the moon was calculated to have a diameter of between 46 km, if its reflectivity is similar to Charon's 35%, and 137 km, if it had a reflectivity of 4%, like the darkest Kuiper belt objects.