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Portal:Sistema Solar

El portal del sistema solar

El Sol y los planetas del Sistema Solar (distancias no a escala)

El Sistema Solar es el sistema gravitacionalmente ligado al Sol y los objetos que lo orbitan. Se formó hace 4.600 millones de años cuando una densa región de una nube molecular colapsó, formando el Sol y un disco protoplanetario . El Sol es una estrella ordinaria de secuencia principal que mantiene un equilibrio mediante la fusión de hidrógeno en helio en su núcleo , liberando esta energía de su fotosfera exterior .

Los objetos más grandes que orbitan alrededor del Sol son los ocho planetas . En orden a partir del Sol, se encuentran cuatro planetas terrestres ( Mercurio , Venus , Tierra y Marte ); dos gigantes gaseosos ( Júpiter y Saturno ); y dos gigantes de hielo ( Urano y Neptuno ). Todos los planetas terrestres tienen superficies sólidas. Por el contrario, todos los planetas gigantes no tienen una superficie definida, ya que están compuestos principalmente de gases y líquidos . Más del 99,86% de la masa del Sistema Solar se encuentra en el Sol y casi el 90% de la masa restante se encuentra en Júpiter y Saturno.

Existe un fuerte consenso entre los astrónomos de que el Sistema Solar tiene al menos ocho planetas enanos : Ceres , Plutón , Haumea , Quaoar , Makemake , Gonggong , Eris y Sedna . Hay una gran cantidad de pequeños cuerpos del Sistema Solar , como asteroides , cometas , centauros , meteoroides y nubes de polvo interplanetarias . Algunos de estos cuerpos se encuentran en el cinturón de asteroides (entre la órbita de Marte y Júpiter) y en el cinturón de Kuiper (justo fuera de la órbita de Neptuno). Seis planetas, seis planetas enanos y otros cuerpos tienen en órbita satélites naturales , a los que comúnmente se les llama 'lunas'.

El Sistema Solar está constantemente inundado por las partículas cargadas del Sol , el viento solar , formando la heliosfera . Alrededor de 75 a 90 unidades astronómicas , el viento solar se detiene y se produce la heliopausa . Este es el límite del Sistema Solar con el espacio interestelar . La región más exterior del Sistema Solar es la teorizada nube de Oort , la fuente de los cometas de período largo , que se extiende entre 2.000 y 200.000 unidades astronómicas (0,032 a 3,2 años luz ). La estrella más cercana al Sistema Solar, Próxima Centauri , está a 4,25 años luz de distancia. Ambas estrellas pertenecen a la Vía Láctea . ( Articulo completo... )

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Imagen de Galileo de 243 Ida. El pequeño punto a la derecha es su luna, Dactyl.
Imagen de Galileo de 243 Ida. El pequeño punto a la derecha es su luna, Dactyl.
243 Ida es un asteroide de la familia Koronis del cinturón principal . Fue descubierto el 29 de septiembre de 1884 por Johann Palisa y lleva el nombre de una ninfa de la mitología griega. Observaciones telescópicas posteriores clasificaron a Ida como un asteroide de tipo S , el tipo más numeroso en el cinturón de asteroides interior. El 28 de agosto de 1993, Ida fue visitada por la nave espacial Galileo , con destino a Júpiter . Fue el segundo asteroide visitado por una nave espacial y el primero en poseer un satélite . Como todos los asteroides del cinturón principal, la órbita de Ida se encuentra entre los planetas Marte y Júpiter. Su período orbital es de 4,84 años y su período de rotación es de 4,63 horas. Ida tiene un diámetro promedio de 31,4 km (19,5 millas). Tiene forma irregular y alargada, y aparentemente está compuesto por dos grandes objetos conectados entre sí en una forma que recuerda a un croissant . Su superficie es una de las más llenas de cráteres del Sistema Solar y presenta una amplia variedad de tamaños y edades de cráteres. La luna de Ida, Dactyl, fue descubierta por Ann Harch, miembro de la misión, en imágenes enviadas por Galileo . Debe su nombre a las criaturas que habitaban el monte Ida en la mitología griega. Los datos obtenidos del sobrevuelo apuntaron a asteroides de tipo S como la fuente de los meteoritos de condritas ordinarias , el tipo más común que se encuentra en la superficie de la Tierra. ( Articulo completo... )

Imagen seleccionada

  • Imagen 1 Cassini–Huygens Crédito de la fotografía: NASA / JPL / Space Science Institute El proyecto de investigación espacial Cassini–Huygens implicó una colaboración entre la NASA, la Agencia Espacial Europea y la Agencia Espacial Italiana para enviar una sonda para estudiar el planeta Saturno y su sistema, incluidos sus anillos y sus satélites naturales. Esta imagen en mosaico en color natural, que combina treinta fotografías, fue tomada por la sonda Cassini en el transcurso de aproximadamente dos horas el 23 de julio de 2008, mientras recorría con su cámara gran angular Saturno y su sistema de anillos a medida que el planeta se acercaba al equinoccio. En el panorama se muestran seis lunas, siendo la más grande, Titán, visible en la parte inferior izquierda. Más fotos seleccionadas
    Crédito de la fotografía: NASA  / JPL  / Instituto de Ciencias Espaciales
    El proyecto de investigación espacial Cassini-Huygens implicó una colaboración entre la NASA , la Agencia Espacial Europea y la Agencia Espacial Italiana para enviar una sonda para estudiar el planeta Saturno y su sistema, incluidos sus anillos y sus satélites naturales . Esta imagen en mosaico en color natural, que combina treinta fotografías, fue tomada por la sonda Cassini en el transcurso de aproximadamente dos horas el 23 de julio de 2008, mientras recorría con su cámara gran angular Saturno y su sistema de anillos a medida que el planeta se acercaba al equinoccio . En el panorama se muestran seis lunas, siendo la más grande, Titán , visible en la parte inferior izquierda.

  • Image 2 Great Red Spot Photo credit: Voyager 1 False-color detail of Jupiter's atmosphere, imaged by Voyager 1, showing the Great Red Spot and a passing white oval. The wavy cloud pattern to the left of the Red Spot is a region of extraordinarily complex and variable wave motion. To give a sense of Jupiter's scale, the white oval storm directly below the Great Red Spot is approximately the same diameter as Earth. More selected pictures
    False-color detail of Jupiter's atmosphere, imaged by Voyager 1, showing the Great Red Spot and a passing white oval. The wavy cloud pattern to the left of the Red Spot is a region of extraordinarily complex and variable wave motion. To give a sense of Jupiter's scale, the white oval storm directly below the Great Red Spot is approximately the same diameter as Earth.
  • Image 3 Iapetus Photo credit: Cassini orbiter A close-up of 10 km (6.2 mi) high mountains within the equatorial ridge on Saturn's moon Iapetus, photographed by the Cassini orbiter. Above the middle of the image can be seen a place where an impact has exposed the bright ice beneath the dark overlying material. The image was taken on September 10, 2007, with the Cassini spacecraft narrow-angle camera at a distance of approximately 3,870 km (2,400 mi) from Iapetus. More selected pictures
    A close-up of 10 km (6.2 mi) high mountains within the equatorial ridge on Saturn's moon Iapetus, photographed by the Cassini orbiter. Above the middle of the image can be seen a place where an impact has exposed the bright ice beneath the dark overlying material. The image was taken on September 10, 2007, with the Cassini spacecraft narrow-angle camera at a distance of approximately 3,870 km (2,400 mi) from Iapetus.
  • Image 4 Sun Diagram credit: Kelvin Ma The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear-fusion reactions in its core, radiating the energy mainly as visible light and infrared radiation. It is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometres (860,000 mi), or 109 times that of Earth. Its mass is about 330,000 times that of Earth, and accounts for about 99.86 percent of the total mass of the Solar System. Roughly three-quarters of the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron. This diagram illustrates the general structure of the Sun, with all features drawn to scale. More selected pictures
    Sun
    Diagram credit: Kelvin Ma
    The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear-fusion reactions in its core, radiating the energy mainly as visible light and infrared radiation. It is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometres (860,000 mi), or 109 times that of Earth. Its mass is about 330,000 times that of Earth, and accounts for about 99.86 percent of the total mass of the Solar System. Roughly three-quarters of the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron. This diagram illustrates the general structure of the Sun, with all features drawn to scale.
  • Image 5 67P/Churyumov–Gerasimenko Photograph: ESA/Rosetta/NAVCAM A black-and-white photographic mosaic depicting the comet 67P/Churyumov–Gerasimenko, as photographed by the probe Rosetta. This Jupiter-family comet, which was originally from the Kuiper belt, is about 4.3 km (2.7 mi) across, has a current orbital period of 6.45 years, a rotation period of approximately 12.4 hours, and a maximum velocity of 135,000 km/h (38 km/s; 84,000 mph). It was first observed on photographic plates in 1969 by Soviet astronomers Klim Churyumov and Svetlana Gerasimenko, after whom it is named. More selected pictures
    Photograph: ESA/Rosetta/NAVCAM
    A black-and-white photographic mosaic depicting the comet 67P/Churyumov–Gerasimenko, as photographed by the probe Rosetta. This Jupiter-family comet, which was originally from the Kuiper belt, is about 4.3 km (2.7 mi) across, has a current orbital period of 6.45 years, a rotation period of approximately 12.4 hours, and a maximum velocity of 135,000 km/h (38 km/s; 84,000 mph). It was first observed on photographic plates in 1969 by Soviet astronomers Klim Churyumov and Svetlana Gerasimenko, after whom it is named.
  • Sunspot TRACE image
    Sunspot TRACE image
    Credit: NASA/TRACE
    A TRACE image of sunspots on the surface, or photosphere, of the Sun from September 2002, is taken in the far ultraviolet on a relatively quiet day for solar activity. However, the image still shows a large sunspot group visible as a bright area near the horizon. Although sunspots are relatively cool regions on the surface of the Sun, the bright glowing gas flowing around the sunspots have a temperature of over one million °C (1.8 million °F). The high temperatures are thought to be related to the rapidly changing magnetic field loops that channel solar plasma.
  • Jupiter
    Jupiter
    Jupiter is the fifth planet from the Sun and by far the largest within the Solar System. It is 318 times more massive than Earth, with a diameter 11 times that of Earth, and with a volume 1300 times that of Earth. Its best known feature is the Great Red Spot, a storm larger than Earth, which was first observed by Galileo four centuries ago. This picture, taken by the Cassini orbiter was one of 26 thousand images taken of Jupiter during the course of its flyby and is the most detailed global color portrait of the planet ever produced.
  • Image 8 Uranus Photo: NASA/JPL/Voyager 2 mission Uranus is the seventh planet from the Sun and the fourth most massive in the Solar System. In this photograph from 1986 the planet appears almost featureless, but recent terrestrial observations have found seasonal changes to be occurring. More selected pictures
    Photo: NASA/JPL/Voyager 2 mission
    Uranus is the seventh planet from the Sun and the fourth most massive in the Solar System. In this photograph from 1986 the planet appears almost featureless, but recent terrestrial observations have found seasonal changes to be occurring.
  • Image 9 C/2014 Q2 (Lovejoy) Photograph: John Vermette C/2014 Q2 (Lovejoy) is a long-period comet discovered in 2014 by Australian astronomer Terry Lovejoy using a 0.2-meter (8 in) Schmidt–Cassegrain telescope. It was discovered at apparent magnitude 15 in the southern constellation of Puppis, and is the fifth comet discovered by Lovejoy. Its blue-green glow is the result of organic molecules and water released by the comet fluorescing under the harsh UV and optical light of the sun as it passes through space. More selected pictures
    Photograph: John Vermette
    C/2014 Q2 (Lovejoy) is a long-period comet discovered in 2014 by Australian astronomer Terry Lovejoy using a 0.2-meter (8 in) Schmidt–Cassegrain telescope. It was discovered at apparent magnitude 15 in the southern constellation of Puppis, and is the fifth comet discovered by Lovejoy. Its blue-green glow is the result of organic molecules and water released by the comet fluorescing under the harsh UV and optical light of the sun as it passes through space.
  • Image 10 Io Photo: NASA A true-color image of Io, one of the moons of Jupiter, taken by the Galileo spacecraft. The dark spot just left of the center is the erupting volcano Prometheus. The whitish plains on either side of it are coated with volcanically deposited sulfur dioxide frost, whereas the yellower regions contain a higher proportion of sulfur. More selected pictures
    Io
    Photo: NASA
    A true-color image of Io, one of the moons of Jupiter, taken by the Galileo spacecraft. The dark spot just left of the center is the erupting volcano Prometheus. The whitish plains on either side of it are coated with volcanically deposited sulfur dioxide frost, whereas the yellower regions contain a higher proportion of sulfur.
  • Image 11 Transit of Venus, 2012 Photo: NASA/SDO A picture of the 2012 transit of Venus by the Solar Dynamics Observatory, from 36,000 km (22,000 mi) above the Earth. A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and Earth. It is one of the rarest predictable astronomical phenomena and happens in pairs eight years apart that are separated from each other by 105 or 121 years. The last transit before 2012 was in 2004, and the next pair of transits will occur in 2117 and 2125. More selected pictures
    Photo: NASA/SDO
    A picture of the 2012 transit of Venus by the Solar Dynamics Observatory, from 36,000 km (22,000 mi) above the Earth. A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and Earth. It is one of the rarest predictable astronomical phenomena and happens in pairs eight years apart that are separated from each other by 105 or 121 years. The last transit before 2012 was in 2004, and the next pair of transits will occur in 2117 and 2125.
  • Earthrise, as seen by Apollo 8
    Earthrise, as seen by Apollo 8
    Earthrise, the first occasion in which humans saw the Earth seemingly rising above the surface of the Moon, taken during the Apollo 8 mission on December 24, 1968. This view was seen by the crew at the beginning of its fourth orbit around the Moon, although the first photograph taken was in black-and-white. Note that the Earth is in shadow here. A photo of a fully lit Earth would not be taken until the Apollo 17 mission.
  • Image 13 Phobos (moon) Photo credit: Mars Reconnaissance Orbiter Phobos, the larger and closer of the two moons of Mars, as seen from about 6,000 kilometres (3,700 mi) away. A small, irregularly shaped object, Phobos orbits about 9,377 km (5,827 mi) from the center of Mars, closer to its primary than any other planetary moon. The illuminated part of Phobos seen in the images is about 21 km (13 mi) across. The most prominent feature in the images is the large crater Stickney in the lower right. With a diameter of 9 km (5.6 mi), it is the largest feature on Phobos. More selected pictures
    Phobos, the larger and closer of the two moons of Mars, as seen from about 6,000 kilometres (3,700 mi) away. A small, irregularly shaped object, Phobos orbits about 9,377 km (5,827 mi) from the center of Mars, closer to its primary than any other planetary moon. The illuminated part of Phobos seen in the images is about 21 km (13 mi) across. The most prominent feature in the images is the large crater Stickney in the lower right. With a diameter of 9 km (5.6 mi), it is the largest feature on Phobos.
  • Five global views of Venus by Magellan.
    Five global views of Venus by Magellan.
    These images are composites of the complete radar image collection obtained by the Magellan mission. The Magellan spacecraft was launched aboard Space Shuttle Atlantis in May 1989 and began mapping the surface of Venus in September 1990. The spacecraft continued to orbit Venus for four years, returning high-resolution images, altimetry, thermal emissions and gravity maps of 98 percent of the surface. Magellan spacecraft operations ended on October 12, 1994, when the radio contact was lost with the spacecraft during its controlled descent into the deeper portions of the Venusian atmosphere.
  • Solar eclipse of 11 August 1999
    Solar eclipse of 11 August 1999
    The solar eclipse of 1999 August 11, as seen from France. This was the most viewed total eclipse in human history, although some areas offered impaired visibility due to adverse weather conditions. The path of the Moon's shadow began in the Atlantic Ocean, before traversing Cornwall, northern France, southern Germany, Austria, Hungary and northern Serbia. Its maximum was in Romania, and it continued across the Black Sea, Turkey, Iran, southern Pakistan and India.
  • Image 16 Aurora australis Photo: NASA/ISS Expedition 23 crew The aurora australis, as seen from the International Space Station. Aurorae are natural light displays in the sky caused by the collision of energetic charged particles with atoms in the high altitude thermosphere. The particles originate in the magnetosphere and solar wind and, on Earth, are directed by Earth's magnetic field into the atmosphere. More selected pictures
    Photo: NASA/ISS Expedition 23 crew
    The aurora australis, as seen from the International Space Station. Aurorae are natural light displays in the sky caused by the collision of energetic charged particles with atoms in the high altitude thermosphere. The particles originate in the magnetosphere and solar wind and, on Earth, are directed by Earth's magnetic field into the atmosphere.
  • Comet Hale-Bopp 29-03-1997
    Comet Hale-Bopp 29-03-1997
    Credit: Philipp Salzgeber
    Comet Hale–Bopp sails across the sky in the vicinity of Pazin in Istria, Croatia. To the lower right of the comet the Andromeda Galaxy is also faintly visible. The comet was visible to the naked eye for a record 18 months, twice as long as the Great Comet of 1811. At perihelion, it shone brighter than any star in the sky except Sirius, and its two tails stretched 30-40 degrees across the sky. The passage of Hale-Bopp was notable also for inciting a degree of panic about comets not seen for decades. Rumours that the comet was being followed by an alien spacecraft inspired a mass suicide among followers of the Heaven's Gate cult.
  • Image 18 Atmosphere of Jupiter Animation: NASA/JPL/University of Arizona A 14-frame clip showing the atmosphere of Jupiter as viewed from the NASA probe Cassini. Taken over a span of 24 Jupiter rotations between October 31 and November 9, 2000, this clip shows various patterns of motion across the planet. The Great Red Spot rotates counterclockwise, and the uneven distribution of its high haze is obvious. To the east (right) of the Red Spot, oval storms, like ball bearings, roll over and pass each other. East-west bands adjacent to each other move at different rates. Strings of small storms rotate around northern-hemisphere ovals. The large grayish-blue "hot spots" at the northern edge of the white Equatorial Zone change over time as they proceed eastward across the planet. Ovals in the north rotate counter to those in the south. Small, very bright features appear quickly and randomly in turbulent regions, possibly lightning storms. The smallest visible features at the equator are about 600 km (370 miles) across. More selected pictures
    A 14-frame clip showing the atmosphere of Jupiter as viewed from the NASA probe Cassini. Taken over a span of 24 Jupiter rotations between October 31 and November 9, 2000, this clip shows various patterns of motion across the planet. The Great Red Spot rotates counterclockwise, and the uneven distribution of its high haze is obvious. To the east (right) of the Red Spot, oval storms, like ball bearings, roll over and pass each other. East-west bands adjacent to each other move at different rates. Strings of small storms rotate around northern-hemisphere ovals. The large grayish-blue "hot spots" at the northern edge of the white Equatorial Zone change over time as they proceed eastward across the planet. Ovals in the north rotate counter to those in the south. Small, very bright features appear quickly and randomly in turbulent regions, possibly lightning storms. The smallest visible features at the equator are about 600 km (370 miles) across.
  • Image 19 The Blue Marble Photo credit: The Apollo 17 crew The Blue Marble is a famous photograph of Earth. NASA officially credits the image to the entire Apollo 17 crew — Eugene Cernan, Ronald Evans and Jack Schmitt — all of whom took photographic images during the mission. Apollo 17 passed over Africa during daylight hours and Antarctica is also illuminated. The photograph was taken approximately five hours after the spacecraft's launch, while en route to the Moon. Apollo 17, notably, was the last manned lunar mission; no humans since have been at a range where taking a "whole-Earth" photograph such as "The Blue Marble" would be possible. More selected pictures
    The Blue Marble is a famous photograph of Earth. NASA officially credits the image to the entire Apollo 17 crew — Eugene Cernan, Ronald Evans and Jack Schmitt — all of whom took photographic images during the mission. Apollo 17 passed over Africa during daylight hours and Antarctica is also illuminated. The photograph was taken approximately five hours after the spacecraft's launch, while en route to the Moon. Apollo 17, notably, was the last manned lunar mission; no humans since have been at a range where taking a "whole-Earth" photograph such as "The Blue Marble" would be possible.
  • Image 20 Pluto Photograph: NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. Discovered by Clyde Tombaugh in 1930, Pluto was originally considered to be the ninth planet from the Sun. Following the discovery of several objects of similar size in the Kuiper belt, its status as a planet was questioned, and in 2006 the International Astronomical Union (IAU) gave a definition of the term "planet" that excluded Pluto. The largest and second-most-massive known dwarf planet in the Solar System, Pluto is primarily made of ice and rock. It is relatively small, with a moderately eccentric and inclined orbit. This photograph of Pluto is a composite of four near-true color images taken by the New Horizons spacecraft in 2015. The most prominent feature in the image, the bright, youthful, nitrogen ice plains of Sputnik Planitia, the left lobe of heart-shaped Tombaugh Regio, is at right center. This contrasts with the darker, more cratered terrain of Cthulhu Macula at lower left. More selected pictures
    Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. Discovered by Clyde Tombaugh in 1930, Pluto was originally considered to be the ninth planet from the Sun. Following the discovery of several objects of similar size in the Kuiper belt, its status as a planet was questioned, and in 2006 the International Astronomical Union (IAU) gave a definition of the term "planet" that excluded Pluto. The largest and second-most-massive known dwarf planet in the Solar System, Pluto is primarily made of ice and rock. It is relatively small, with a moderately eccentric and inclined orbit.

    This photograph of Pluto is a composite of four near-true color images taken by the New Horizons spacecraft in 2015. The most prominent feature in the image, the bright, youthful, nitrogen ice plains of Sputnik Planitia, the left lobe of heart-shaped Tombaugh Regio, is at right center. This contrasts with the darker, more cratered terrain of Cthulhu Macula at lower left.
  • Mars
    Mars
    Mars
    Credit: NASA
    Mars, the fourth planet from the Sun, is named after the Roman god of war because of its blood red color. Mars has two small, oddly-shaped moons, Phobos and Deimos, named after the sons of the Greek god Ares. At some point in the future Phobos will be broken up by gravitational forces. The atmosphere on Mars is 95% carbon dioxide. In 2003 methane was also discovered in the atmosphere. Since methane is an unstable gas, this indicates that there must be (or have been within the last few hundred years) a source of the gas on the planet.
  • Image 22 Geocentric model Photo credit: Joaquim Alves Gaspar Illustration of the Ptolemaic geocentric model of the Universe (the theory that the Earth is the center of the universe) by Portuguese cosmographer and cartographer Bartolomeu Velho. Taken from his treatise Cosmographia, made in Paris, 1568. Notice the distances of the bodies to the centre of the Earth (left) and the times of revolution, in years (right). More selected pictures
    Illustration of the Ptolemaic geocentric model of the Universe (the theory that the Earth is the center of the universe) by Portuguese cosmographer and cartographer Bartolomeu Velho. Taken from his treatise Cosmographia, made in Paris, 1568. Notice the distances of the bodies to the centre of the Earth (left) and the times of revolution, in years (right).
  • Image 23 Jupiter Diagram: Kelvin Song A diagram of Jupiter showing a model of the planet's interior, with a rocky core overlaid by a deep layer of liquid metallic hydrogen and an outer layer predominantly of molecular hydrogen. Jupiter's true interior composition is uncertain. For instance, the core may have shrunk as convection currents of hot liquid metallic hydrogen mixed with the molten core and carried its contents to higher levels in the planetary interior. Furthermore, there is no clear physical boundary between the hydrogen layers—with increasing depth the gas increases smoothly in temperature and density, ultimately becoming liquid. More selected pictures
    A diagram of Jupiter showing a model of the planet's interior, with a rocky core overlaid by a deep layer of liquid metallic hydrogen and an outer layer predominantly of molecular hydrogen. Jupiter's true interior composition is uncertain. For instance, the core may have shrunk as convection currents of hot liquid metallic hydrogen mixed with the molten core and carried its contents to higher levels in the planetary interior. Furthermore, there is no clear physical boundary between the hydrogen layers—with increasing depth the gas increases smoothly in temperature and density, ultimately becoming liquid.

Imágenes generalesLas siguientes son imágenes de varios artículos relacionados con el Sistema Solar en Wikipedia.

¿Sabías que – mostrar diferentes entradas?

Gran cometa de 1577

  • ...¿que el paso del Gran Cometa de 1577 ( en la foto ) provocó un debate que duró casi un siglo, durante el cual Galileo argumentó que los cometas eran meras ilusiones ópticas?

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En las noticias

Portal espacial Wikinoticias
  • 7 de abril : El helicóptero Ingenuity de la NASA sobrevive a su primera noche en Marte
  • 25 de diciembre : 'La vida basada en la Tierra puede sobrevivir en atmósferas ricas en hidrógeno': la profesora del MIT, la Dra. Seager, cuenta a Wikinews sobre su investigación sobre organismos que prosperan en ambientes sin oxígeno.
  • 7 de julio : El astrónomo Anthony Boccaletti analiza la observación del nacimiento de un potencial exoplaneta con Wikinews.
  • 31 de mayo : SpaceX lanza con éxito su primer vuelo espacial tripulado
  • 22 de mayo : Astrónomo cuenta a Wikinews sobre el descubrimiento del agujero negro más cercano conocido hasta ahora
  • 12 de octubre : Muere el cosmonauta Alexei Leonov a los 85 años
  • 10 de octubre : La Academia Sueca anuncia los ganadores del Premio Nobel de Física 2019
  • 14 de septiembre : Los astrónomos encuentran vapor de agua en la atmósfera del exoplaneta K2-18b.
  • 5 de marzo : La cápsula SpaceX Crew Dragon se acopla a la Estación Espacial Internacional
  • 9 de enero : Animales simples podrían vivir en salmueras marcianas: Wikinews entrevista al científico planetario Vlada Stamenković
  • 29 de noviembre : El módulo de aterrizaje InSight de la NASA llega a Marte
  • 12 de octubre : La misión espacial tripulada Soyuz se cancela durante el lanzamiento.

Temas principales

The SunMercuryVenusThe MoonEarthMarsPhobos and DeimosCeresThe main asteroid beltJupiterMoons of JupiterSaturnMoons of SaturnUranusMoons of UranusNeptuneMoons of NeptunePlutoMoons of PlutoHaumeaMoons of HaumeaMakemakeThe Kuiper BeltErisDysnomiaThe Scattered DiscThe Hills CloudThe Oort Cloud

Sistema Solar : Planetas ( Definición  · Habitabilidad planetaria  · Planetas terrestres  · Gigantes gaseosos  · Anillos· Planetas enanos ( Plutoides· Colonización  · Cronología del descubrimiento ˑ Exploración  · Lunas  · Planetarios

Sol : Mancha solar  · Viento solar  · Llamarada solar  · Eclipse solar
Mercurio : Geología  · Exploración ( Mariner 10  · MESSENGER  · BepiColombo· Tránsito
Venus : Geología  · Atmósfera  · Exploración ( Venera  · Programa Mariner 2 / 5 / 10  · Pionero  · Vega 1 / 2 ˑ Magallanes  · Venus Express· Tránsito
Tierra : Historia  · Geología  · Geografía  · Atmósfera  · Rotación
Luna : Geología  · Selenografía  · Atmósfera  · Exploración ( Luna  · Apolo 8 / 11 )  · Órbita  · Eclipse lunar
Marte : Lunas ( Fobos  · Deimos )  · Geología  · Geografía  · Atmósfera  · Exploración ( Mariner  · Marte  · Viking 1 / 2  · Pathfinder  · MER )
Ceres : Exploración ( Amanecer )
Júpiter : Lunas ( Amaltea , Io  · Europa  · Ganímedes  · Calisto )  · Anillos  · Atmósfera  · Magnetosfera  · Exploración ( Pioneer 10 / 11  · Voyager 1 / 2  · Ulises  · Cassini  · Galileo  · Nuevos Horizontes )
Saturno : Lunas ( Mimas  · Encélado  · Tetis  · Dione  · Rea  · Titán  · Japeto )  · Anillos  · Exploración ( Pioneer 11  · Voyager 1 / 2  · CassiniHuygens )
Urano : Lunas ( Miranda  · Ariel  · Umbriel  · Titania  · Oberon )  · Anillos  · Exploración ( Voyager 2 )
Neptuno : Lunas ( Tritón )  · Anillos  · Exploración ( Voyager 2 )
Planetas más allá de Neptuno
Plutón : Lunas ( Caronte , Nix , Hidra , Kerberos , Styx )  · Exploración ( Nuevos Horizontes )
Haumea : Lunas ( Hi'iaka , Namaka )
hacer hacer
Eris : Disnomia
Cuerpos pequeños : Meteoroides  · Asteroides ( Cinturón de asteroides· Centauros  · TNO ( Cinturón de Kuiper  · Disco disperso  · Nube de Oort· Cometas ( Hale–Bopp  · Halley’s  · Hyakutake  · Shoemaker–Levy 9 )
Formación y evolución del Sistema Solar : Historia de las hipótesis de formación y evolución del Sistema Solar  · Hipótesis nebular
Ver también: Contenido destacado  · Tema destacado  · Buenos artículos  · Lista de objetos

Se presentan artículos en negrita . Los artículos
en cursiva se refieren a planetas enanos o lunas importantes.

Cosas que puedes hacer

El planeta Saturno, ver aquí eclipsando al sol.
El planeta Saturno, ver aquí eclipsando al sol.

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