doc_id int32 0 2.25M | text stringlengths 101 8.13k | source stringlengths 38 44 |
|---|---|---|
1,800 | In some ways Skathi's orbit is typical of Saturn's irregular moons, but its orbit differs in some important ways from all of the other objects in this group: for instance, its orbit is unusually fast for an irregular satellite of Saturn, and has a smaller semi-major axis than all of Saturn's other retrograde moons exce... | https://en.wikipedia.org/wiki?curid=589853 |
1,801 | Skathi's rotation period was initially estimated to be between 11 and 12 hours. As of 2019, the most precise measurements were those taken by the "Cassini" probe, which identified the time taken for Skathi to revolve around its axis of rotation at hours. | https://en.wikipedia.org/wiki?curid=589853 |
1,802 | Skathi was first identified by Earth-based observations, and much of the information about Skathi's features and composition comes from observations taken from the Earth. The "Cassini" probe also observed Skathi on eight occasions between March 2011 and August 2016. However, these observations were conducted during a f... | https://en.wikipedia.org/wiki?curid=589853 |
1,803 | It has an apparent optical magnitude of 23.6 from Earth, and an absolute visual magnitude of about 14, so it is much less bright from Earth than many hundreds of thousands of objects outside the Solar System. From Earth it appears close to the much brighter object that it orbits, Saturn, and is assumed to have a low su... | https://en.wikipedia.org/wiki?curid=589853 |
1,804 | Observations by "Cassini" suggest that Skathi is about in diameter. The amount of light that Skathi reflects varies substantially as it rotates, which implies that it is an irregularly shaped object. | https://en.wikipedia.org/wiki?curid=589853 |
1,805 | Many of Saturn's moons are composed of water ice and rock, but Skathi's chemical composition has not been determined, and it may have different physical composition than Saturn's other moons (particularly because it may not have originated in the vicinity of Saturn). The density of Skathi is also not known, but Saturni... | https://en.wikipedia.org/wiki?curid=589853 |
1,806 | There has been active debate on the origin of Skathi and Saturn's other irregular satellites, prompted by how different their orbits are compared to other satellites of Saturn and of the sun. The planets and satellites of a planetary system are thought to usually form by accreting together out of objects in a protoplan... | https://en.wikipedia.org/wiki?curid=589853 |
1,807 | One possibility is that Skathi originally formed somewhere other than in the vicinity of Saturn, and then began to travel through space before being captured by the planet. However, it is also possible that Skathi is a piece of debris that was knocked off of one of Saturn's other moons, during a collision with another ... | https://en.wikipedia.org/wiki?curid=589853 |
1,808 | The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority (99.86%) of the system's mass is in the Sun, with most of the remaining mass contained in the planet J... | https://en.wikipedia.org/wiki?curid=26903 |
1,809 | There are an unknown number of smaller dwarf planets and innumerable small Solar System bodies orbiting the Sun. Six of the major planets, the six largest possible dwarf planets, and many of the smaller bodies are orbited by natural satellites, commonly called "moons" after Earth's Moon. Two natural satellites, Jupiter... | https://en.wikipedia.org/wiki?curid=26903 |
1,810 | In the outer reaches of the Solar System lies a class of minor planets called detached objects. There is considerable debate as to how many such objects there will prove to be. Some of these objects are large enough to have rounded under their own gravity and thus to be categorized as dwarf planets. Astronomers general... | https://en.wikipedia.org/wiki?curid=26903 |
1,811 | The solar wind, a stream of charged particles flowing outwards from the Sun, creates a bubble-like region of interplanetary medium in the interstellar medium known as the heliosphere. The heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of the interstellar medium; it exten... | https://en.wikipedia.org/wiki?curid=26903 |
1,812 | The Solar System formed 4.568 billion years ago from the gravitational collapse of a region within a large molecular cloud. This initial cloud was likely several light-years across and probably birthed several stars. As is typical of molecular clouds, this one consisted mostly of hydrogen, with some helium, and small a... | https://en.wikipedia.org/wiki?curid=26903 |
1,813 | Due to their higher boiling points, only metals and silicates could exist in solid form in the warm inner Solar System close to the Sun, and these would eventually form the rocky planets of Mercury, Venus, Earth, and Mars. Because metallic elements only comprised a very small fraction of the solar nebula, the terrestri... | https://en.wikipedia.org/wiki?curid=26903 |
1,814 | Within 50 million years, the pressure and density of hydrogen in the centre of the protostar became great enough for it to begin thermonuclear fusion. The temperature, reaction rate, pressure, and density increased until hydrostatic equilibrium was achieved: the thermal pressure counterbalancing the force of gravity. A... | https://en.wikipedia.org/wiki?curid=26903 |
1,815 | The Solar System will remain roughly as it is known today until the hydrogen in the core of the Sun has been entirely converted to helium, which will occur roughly 5 billion years from now. This will mark the end of the Sun's main-sequence life. At that time, the core of the Sun will contract with hydrogen fusion occur... | https://en.wikipedia.org/wiki?curid=26903 |
1,816 | The expanding Sun is expected to vaporize Mercury as well as Venus, and render Earth uninhabitable (possibly destroying it as well). Eventually, the core will be hot enough for helium fusion; the Sun will burn helium for a fraction of the time it burned hydrogen in the core. The Sun is not massive enough to commence th... | https://en.wikipedia.org/wiki?curid=26903 |
1,817 | The word "solar" means "pertaining to the Sun", which is derived from the Latin word "sol", meaning Sun. The Sun is the dominant gravitational member of the Solar System, and its planetary system is maintained in a relatively stable, slowly evolving state by following isolated, gravitationally bound orbits around the S... | https://en.wikipedia.org/wiki?curid=26903 |
1,818 | The planets and other large objects in orbit around the Sun lie near the plane of Earth's orbit, known as the ecliptic. Smaller icy objects such as comets frequently orbit at significantly greater angles to this plane. Most of the planets in the Solar System have secondary systems of their own, being orbited by natural... | https://en.wikipedia.org/wiki?curid=26903 |
1,819 | As a result of the formation of the Solar System, planets and most other objects orbit the Sun in the same direction that the Sun is rotating. That is, counter-clockwise, as viewed from above Earth's north pole. There are exceptions, such as Halley's Comet. Most of the larger moons orbit their planets in prograde direc... | https://en.wikipedia.org/wiki?curid=26903 |
1,820 | To a good first approximation, Kepler's laws of planetary motion describe the orbits of objects about the Sun. These laws stipulate that each object travels along an ellipse with the Sun at one focus, which causes the body's distance from the Sun to vary over the course of its year. A body's closest approach to the Sun... | https://en.wikipedia.org/wiki?curid=26903 |
1,821 | The angular momentum of the Solar System is a measure of the total amount of orbital and rotational momentum possessed by all its moving components. Although the Sun dominates the system by mass, it accounts for only about 2% of the angular momentum. The planets, dominated by Jupiter, account for most of the rest of th... | https://en.wikipedia.org/wiki?curid=26903 |
1,822 | The overall structure of the charted regions of the Solar System consists of the Sun, four smaller inner planets surrounded by a belt of mostly rocky asteroids, and four giant planets surrounded by the Kuiper belt of mostly icy objects. Astronomers sometimes informally divide this structure into separate regions. The i... | https://en.wikipedia.org/wiki?curid=26903 |
1,823 | The principal component of the Solar System is the Sun, a low-mass star that contains 99.86% of the system's known mass and dominates it gravitationally. The Sun's four largest orbiting bodies, the giant planets, account for 99% of the remaining mass, with Jupiter and Saturn together comprising more than 90%. The remai... | https://en.wikipedia.org/wiki?curid=26903 |
1,824 | The Sun is composed of roughly 98% hydrogen and helium, as are Jupiter and Saturn. A composition gradient exists in the Solar System, created by heat and light pressure from the early Sun; those objects closer to the Sun, which are more affected by heat and light pressure, are composed of elements with high melting poi... | https://en.wikipedia.org/wiki?curid=26903 |
1,825 | The objects of the inner Solar System are composed mostly of rocky materials, such as silicates, iron or nickel. Jupiter and Saturn are composed mainly of gases with extremely low melting points and high vapour pressure, such as hydrogen, helium, and neon. Ices, like water, methane, ammonia, hydrogen sulfide, and carbo... | https://en.wikipedia.org/wiki?curid=26903 |
1,826 | The astronomical unit [AU] () would be the distance from the Earth to the Sun if the planet's orbit were perfectly circular. For comparison, the radius of the Sun is . Thus, the Sun occupies 0.00001% (10 %) of the volume of a sphere with a radius the size of Earth's orbit, whereas Earth's volume is roughly one milliont... | https://en.wikipedia.org/wiki?curid=26903 |
1,827 | With a few exceptions, the farther a planet or belt is from the Sun, the larger the distance between its orbit and the orbit of the next nearer object to the Sun. For example, Venus is approximately 0.33 AU farther out from the Sun than Mercury, whereas Saturn is 4.3 AU out from Jupiter, and Neptune lies 10.5 AU out fr... | https://en.wikipedia.org/wiki?curid=26903 |
1,828 | Some Solar System models attempt to convey the relative scales involved in the Solar System on human terms. Some are small in scale (and may be mechanical—called orreries)—whereas others extend across cities or regional areas. The largest such scale model, the Sweden Solar System, uses the 110-metre (361 ft) Avicii Are... | https://en.wikipedia.org/wiki?curid=26903 |
1,829 | If the Sun–Neptune distance is scaled to , then the Sun would be about in diameter (roughly two-thirds the diameter of a golf ball), the giant planets would be all smaller than about , and Earth's diameter along with that of the other terrestrial planets would be smaller than a flea () at this scale. | https://en.wikipedia.org/wiki?curid=26903 |
1,830 | The Sun is the Solar System's star and by far its most massive component. Its large mass (332,900 Earth masses), which comprises 99.86% of all the mass in the Solar System, produces temperatures and densities in its core high enough to sustain nuclear fusion of hydrogen into helium. This releases an enormous amount of ... | https://en.wikipedia.org/wiki?curid=26903 |
1,831 | Because the Sun fuses hydrogen into helium at its core, it is a main-sequence star. More specifically, it is a G2-type main-sequence star, where the type designation refers to its effective temperature. Hotter main-sequence stars are more luminous. The Sun's temperature is intermediate between that of the hottest stars... | https://en.wikipedia.org/wiki?curid=26903 |
1,832 | The Sun is a population I star; it has a higher abundance of elements heavier than hydrogen and helium ("metals" in astronomical parlance) than the older population II stars. Elements heavier than hydrogen and helium were formed in the cores of ancient and exploding stars, so the first generation of stars had to die be... | https://en.wikipedia.org/wiki?curid=26903 |
1,833 | Outside of the main part of the Sun's atmosphere extends the heliosphere and dominates the Solar planetary system. The vast majority of the heliosphere is occupied by a near-vacuum known as the interplanetary medium. Along with light, the Sun radiates a continuous stream of charged particles (a plasma) called the solar... | https://en.wikipedia.org/wiki?curid=26903 |
1,834 | Earth's magnetic field stops its atmosphere from being stripped away by the solar wind. Venus and Mars do not have magnetic fields, and as a result the solar wind is causing their atmospheres to gradually bleed away into space. Coronal mass ejections and similar events blow a magnetic field and huge quantities of mater... | https://en.wikipedia.org/wiki?curid=26903 |
1,835 | The heliosphere and planetary magnetic fields (for those planets that have them) partially shield the Solar System from high-energy interstellar particles called cosmic rays. The density of cosmic rays in the interstellar medium and the strength of the Sun's magnetic field change on very long timescales, so the level o... | https://en.wikipedia.org/wiki?curid=26903 |
1,836 | The interplanetary medium is home to at least two disc-like regions of cosmic dust. The first, the zodiacal dust cloud, lies in the inner Solar System and causes the zodiacal light. It may have been formed by collisions within the asteroid belt brought on by gravitational interactions with the planets; a more recent pr... | https://en.wikipedia.org/wiki?curid=26903 |
1,837 | The zone of hability of the Solar System is located in the Inner Solar System. Beside the Solar conditions for hability on Solar System objects such as Earth, habitability might be possibly in subsurface oceans of various Outer Solar System moons. | https://en.wikipedia.org/wiki?curid=26903 |
1,838 | The inner Solar System is the region comprising the terrestrial planets and the asteroid belt. Composed mainly of silicates and metals, the objects of the inner Solar System are relatively close to the Sun; the radius of this entire region is less than the distance between the orbits of Jupiter and Saturn. This region ... | https://en.wikipedia.org/wiki?curid=26903 |
1,839 | The four terrestrial or inner planets have dense, rocky compositions, few or no moons, and no ring systems. They are composed largely of refractory minerals such as the silicateswhich form their crusts and mantlesand metals such as iron and nickel which form their cores. Three of the four inner planets (Venus, Earth an... | https://en.wikipedia.org/wiki?curid=26903 |
1,840 | Mercury ( from the Sun) is the closest planet to the Sun. The smallest planet in the Solar System (), Mercury has no natural satellites. The dominant geological features are impact craters or basins with ejecta blankets, the remains of early volcanic activity including magma flows, and lobed ridges or rupes that were p... | https://en.wikipedia.org/wiki?curid=26903 |
1,841 | There have been searches for "Vulcanoids", asteroids in stable orbits between Mercury and the Sun, but none have been discovered. | https://en.wikipedia.org/wiki?curid=26903 |
1,842 | Venus ( from the Sun) is close in size to Earth () and, like Earth, has a thick silicate mantle around an iron core, a substantial atmosphere, and evidence of internal geological activity. It is much drier than Earth, and its atmosphere is ninety times as dense. Venus has no natural satellites. It is the hottest planet... | https://en.wikipedia.org/wiki?curid=26903 |
1,843 | Earth ( from the Sun) is the largest and densest of the inner planets, the only one known to have current geological activity, and the only place where life is known to exist. Its liquid hydrosphere is unique among the terrestrial planets, and it is the only planet where plate tectonics has been observed. Earth's atmos... | https://en.wikipedia.org/wiki?curid=26903 |
1,844 | Mars ( from the Sun) is smaller than Earth and Venus (). It has an atmosphere of mostly carbon dioxide with a surface pressure of ; roughly 0.6% of that of Earth but sufficient to support weather phenomena. Its surface, peppered with volcanoes, such as Olympus Mons, and rift valleys, such as Valles Marineris, shows geo... | https://en.wikipedia.org/wiki?curid=26903 |
1,845 | Asteroids except for the largest, Ceres, are classified as small Solar System bodies and are composed mainly of refractory rocky and metallic minerals, with some ice. They range from a few metres to hundreds of kilometres in size. Asteroids smaller than one meter are usually called meteoroids and micrometeoroids (grain... | https://en.wikipedia.org/wiki?curid=26903 |
1,846 | The asteroid belt occupies the orbit between Mars and Jupiter, between from the Sun. It is thought to be remnants from the Solar System's formation that failed to coalesce because of the gravitational interference of Jupiter. The asteroid belt contains tens of thousands, possibly millions, of objects over one kilometre... | https://en.wikipedia.org/wiki?curid=26903 |
1,847 | Ceres ( from the Sun) is the largest asteroid, a protoplanet, and a dwarf planet. It has a diameter of slightly under and a mass large enough for its own gravity to pull it into a spherical shape. Ceres was considered a planet when it was discovered in 1801, but as further observations revealed additional asteroids, it... | https://en.wikipedia.org/wiki?curid=26903 |
1,848 | Pallas (2.77 AU from the Sun) and Vesta (2.36 AU from the Sun) are the largest asteroids in the asteroid belt, after Ceres. They are the other two protoplanets that survive more or less intact. At about in diameter, they were large enough to have developed planetary geology in the past, but both have suffered large imp... | https://en.wikipedia.org/wiki?curid=26903 |
1,849 | Asteroids in the asteroid belt are divided into asteroid groups and families based on their orbital characteristics. Kirkwood gaps are sharp dips in the distribution of asteroid orbits that correspond to orbital resonances with Jupiter. Asteroid moons are asteroids that orbit larger asteroids. They are not as clearly d... | https://en.wikipedia.org/wiki?curid=26903 |
1,850 | Jupiter trojans are located in either of Jupiter's L or L points (gravitationally stable regions leading and trailing a planet in its orbit); the term is also used for small bodies in any other planetary or satellite Lagrange point. Hilda asteroids are in a 2:3 resonance with Jupiter; that is, they go around the Sun th... | https://en.wikipedia.org/wiki?curid=26903 |
1,851 | The outer region of the Solar System is home to the giant planets and their large moons. The centaurs and many short-period comets also orbit in this region. Due to their greater distance from the Sun, the solid objects in the outer Solar System contain a higher proportion of volatiles, such as water, ammonia, and meth... | https://en.wikipedia.org/wiki?curid=26903 |
1,852 | The four outer planets, also called giant planets or Jovian planets, collectively make up 99% of the mass known to orbit the Sun. Jupiter and Saturn are together more than 400 times the mass of Earth and consist overwhelmingly of the gases hydrogen and helium, hence their designation as gas giants. Uranus and Neptune a... | https://en.wikipedia.org/wiki?curid=26903 |
1,853 | The ring–moon systems of Jupiter, Saturn, and Uranus are like miniature versions of the Solar System; that of Neptune is significantly different, having been disrupted by the capture of its largest moon Triton. | https://en.wikipedia.org/wiki?curid=26903 |
1,854 | Jupiter ( from the Sun), at , is 2.5 times the mass of all the other planets put together. It is composed largely of hydrogen and helium. Jupiter's strong internal heat creates semi-permanent features in its atmosphere, such as cloud bands and the Great Red Spot. The planet possesses a 4.2– strength magnetosphere that ... | https://en.wikipedia.org/wiki?curid=26903 |
1,855 | Saturn ( from the Sun), distinguished by its extensive ring system, has several similarities to Jupiter, such as its atmospheric composition and magnetosphere. Although Saturn has 60% of Jupiter's volume, it is less than a third as massive, at . Saturn is the only planet of the Solar System that is less dense than wate... | https://en.wikipedia.org/wiki?curid=26903 |
1,856 | Uranus ( from the Sun), at , has the lowest mass of the outer planets. Uniquely among the planets, it orbits the Sun on its side; its axial tilt is over ninety degrees to the ecliptic. This gives the planet extreme seasonal variation as each pole points toward and then away from the Sun. It has a much colder core than ... | https://en.wikipedia.org/wiki?curid=26903 |
1,857 | Neptune ( from the Sun), though slightly smaller than Uranus, is more massive () and hence more dense. It radiates more internal heat than Uranus, but not as much as Jupiter or Saturn. Neptune has 14 known satellites. The largest, Triton, is geologically active, with geysers of liquid nitrogen. Triton is the only large... | https://en.wikipedia.org/wiki?curid=26903 |
1,858 | The centaurs are icy comet-like bodies whose orbits have semi-major axes greater than Jupiter's () and less than Neptune's (). The largest known centaur, 10199 Chariklo, has a diameter of about . The first centaur discovered, 2060 Chiron, has also been classified as a comet (95P) because it develops a coma just as come... | https://en.wikipedia.org/wiki?curid=26903 |
1,859 | Comets are small Solar System bodies, typically only a few kilometres across, composed largely of volatile ices. They have highly eccentric orbits, generally a perihelion within the orbits of the inner planets and an aphelion far beyond Pluto. When a comet enters the inner Solar System, its proximity to the Sun causes ... | https://en.wikipedia.org/wiki?curid=26903 |
1,860 | Short-period comets have orbits lasting less than two hundred years. Long-period comets have orbits lasting thousands of years. Short-period comets are thought to originate in the Kuiper belt, whereas long-period comets, such as Hale–Bopp, are thought to originate in the Oort cloud. Many comet groups, such as the Kreut... | https://en.wikipedia.org/wiki?curid=26903 |
1,861 | Inside the orbit of Neptune is the planetary region of the Solar System. Beyond the orbit of Neptune lies the area of the "trans-Neptunian region", with the doughnut-shaped Kuiper belt, home of Pluto and several other dwarf planets, and an overlapping disc of scattered objects, which is tilted toward the plane of the S... | https://en.wikipedia.org/wiki?curid=26903 |
1,862 | The Kuiper belt is a great ring of debris similar to the asteroid belt, but consisting mainly of objects composed primarily of ice. It extends between from the Sun. It is composed mainly of small Solar System bodies, although the largest few are probably large enough to be dwarf planets. There are estimated to be over ... | https://en.wikipedia.org/wiki?curid=26903 |
1,863 | The Kuiper belt can be roughly divided into the "classical" belt and the resonant trans-Neptunian objects. The latter have orbits whose periods are in a simple ratio to that of Neptune: for example, going around the Sun twice for every three times that Neptune does, or once for every two. The classical belt consists of... | https://en.wikipedia.org/wiki?curid=26903 |
1,864 | The dwarf planet Pluto (with an average orbit of from the Sun) is the largest known object in the Kuiper belt. When discovered in 1930, it was considered to be the ninth planet; this changed in 2006 with the adoption of a formal definition of planet. Pluto has a relatively eccentric orbit inclined 17 degrees to the ecl... | https://en.wikipedia.org/wiki?curid=26903 |
1,865 | Charon, the largest of Pluto's moons, is sometimes described as part of a binary system with Pluto, as the two bodies orbit a barycentre of gravity above their surfaces (i.e. they appear to "orbit each other"). Beyond Charon, four much smaller moons, Styx, Nix, Kerberos, and Hydra, orbit Pluto. | https://en.wikipedia.org/wiki?curid=26903 |
1,866 | Besides Pluto, astronomers generally agree that at least four other Kuiper belt objects are dwarf planets, and additional bodies have also been proposed: | https://en.wikipedia.org/wiki?curid=26903 |
1,867 | The scattered disc, which overlaps the Kuiper belt but extends out to near 500 AU, is thought to be the source of short-period comets. Scattered-disc objects are believed to have been perturbed into erratic orbits by the gravitational influence of Neptune's early outward migration. Most scattered disc objects (SDOs) ha... | https://en.wikipedia.org/wiki?curid=26903 |
1,868 | (67.78 AU average from the Sun) is the largest known scattered disc object, and caused a debate about what constitutes a planet, because it is 25% more massive than Pluto and about the same diameter. It is the most massive of the known dwarf planets. It has one known moon, Dysnomia. Like Pluto, its orbit is highly ecce... | https://en.wikipedia.org/wiki?curid=26903 |
1,869 | The point at which the Solar System ends and interstellar space begins is not precisely defined because its outer boundaries are shaped by two forces, the solar wind and the Sun's gravity. The limit of the solar wind's influence is roughly four times Pluto's distance from the Sun; this "heliopause", the outer boundary ... | https://en.wikipedia.org/wiki?curid=26903 |
1,870 | The Sun's stellar-wind bubble, the heliosphere, a region of space dominated by the Sun, has its boundary at the "termination shock", which is roughly 80–100 AU from the Sun upwind of the interstellar medium and roughly 200 AU from the Sun downwind. Here the solar wind collides with the interstellar medium and dramatica... | https://en.wikipedia.org/wiki?curid=26903 |
1,871 | The outer boundary of the heliosphere, the "heliopause", is the point at which the solar wind finally terminates and is the beginning of interstellar space. "Voyager 1" and "Voyager 2" passed the termination shock and entered the heliosheath at 94 and 84 AU from the Sun, respectively. "Voyager 1" was reported to have c... | https://en.wikipedia.org/wiki?curid=26903 |
1,872 | The shape and form of the outer edge of the heliosphere is likely affected by the fluid dynamics of interactions with the interstellar medium as well as solar magnetic fields prevailing to the south, e.g. it is bluntly shaped with the northern hemisphere extending 9 AU farther than the southern hemisphere. Beyond the h... | https://en.wikipedia.org/wiki?curid=26903 |
1,873 | (with an average orbit of 520 AU from the Sun) is a large, reddish object with a gigantic, highly elliptical orbit that takes it from about 76 AU at perihelion to 940 AU at aphelion and takes 11,400 years to complete. Mike Brown, who discovered the object in 2003, asserts that it cannot be part of the scattered disc or... | https://en.wikipedia.org/wiki?curid=26903 |
1,874 | The Oort cloud is a hypothetical spherical cloud of up to a trillion icy objects that is thought to be the source for all long-period comets and to surround the Solar System at roughly 50,000 AU (around 1 light-year (ly)) from the Sun, and possibly to as far as 100,000 AU (1.87 ly). It is thought to be composed of come... | https://en.wikipedia.org/wiki?curid=26903 |
1,875 | Much of the Solar System is still unknown. The Sun's gravitational field is estimated to dominate the gravitational forces of surrounding stars out to about two light-years (125,000 AU). Lower estimates for the radius of the Oort cloud, by contrast, do not place it farther than 50,000 AU. Most of the mass is orbiting i... | https://en.wikipedia.org/wiki?curid=26903 |
1,876 | The Solar System is located in the Milky Way, a barred spiral galaxy with a diameter of about 100,000 light-years containing more than 100 billion stars. The Sun resides in one of the Milky Way's outer spiral arms, known as the Orion–Cygnus Arm or Local Spur. The Sun lies about 26,660 light-years from the Galactic Cent... | https://en.wikipedia.org/wiki?curid=26903 |
1,877 | The Solar System's location in the Milky Way is a factor in the evolutionary history of life on Earth. Its orbit is close to circular, and orbits near the Sun are at roughly the same speed as that of the spiral arms. Therefore, the Sun passes through arms only rarely. Because spiral arms are home to a far larger concen... | https://en.wikipedia.org/wiki?curid=26903 |
1,878 | The Solar System lies well outside the star-crowded environs of the galactic centre. Near the centre, gravitational tugs from nearby stars could perturb bodies in the Oort cloud and send many comets into the inner Solar System, producing collisions with potentially catastrophic implications for life on Earth. The inten... | https://en.wikipedia.org/wiki?curid=26903 |
1,879 | The Solar System is surrounded by the Local Interstellar Cloud, although it is not clear if it is embedded in the Local Interstellar Cloud or if it lies just outside the cloud's edge. Multiple other interstellar clouds also exist in the region within 300 light-years of the Sun, known as the Local Bubble. The latter fea... | https://en.wikipedia.org/wiki?curid=26903 |
1,880 | The Local Bubble is a small superbubble compared to the neighbouring wider Radcliffe Wave and "Split" linear structures (formerly Gould Belt), each of which are some thousands of light-years in length. All these structures are part of the Orion Arm, which contains most of the stars in the Milky Way that are visible to ... | https://en.wikipedia.org/wiki?curid=26903 |
1,881 | Within ten light-years of the Sun there are relatively few stars, the closest being the triple star system Alpha Centauri, which is about 4.4 light-years away and may be in the Local Bubble's G-Cloud. Alpha Centauri A and B are a closely tied pair of Sun-like stars, whereas the closest star to Earth, the small red dwar... | https://en.wikipedia.org/wiki?curid=26903 |
1,882 | The next closest known fusors to the Sun are the red dwarfs Barnard's Star (at 5.9 ly), Wolf 359 (7.8 ly), and Lalande 21185 (8.3 ly). The nearest brown dwarfs belong to the binary Luhman 16 system (6.6 ly), and the closest known rogue or free-floating planetary-mass object at less than 10 Jupiter masses is the sub-bro... | https://en.wikipedia.org/wiki?curid=26903 |
1,883 | Just beyond at 8.6 ly lies Sirius, the brightest star in Earth's night sky, with roughly twice the Sun's mass, orbited by the closest white dwarf to Earth, Sirius B. Other stars within ten light-years are the binary red-dwarf system Luyten 726-8 (8.7 ly) and the solitary red dwarf Ross 154 (9.7 ly). The closest solitar... | https://en.wikipedia.org/wiki?curid=26903 |
1,884 | The nearest and unaided-visible group of stars beyond the immediate celestial neighbourhood is the Ursa Major Moving Group at roughly 80 light-years, which is within the Local Bubble, like the nearest as well as unaided-visible star cluster the Hyades, which lie at its edge. The closest star-forming regions are the Cor... | https://en.wikipedia.org/wiki?curid=26903 |
1,885 | Compared to many extrasolar systems, the Solar System stands out in lacking planets interior to the orbit of Mercury. The known Solar System also lacks super-Earths, planets between one and ten times as massive as the Earth, although the hypothetical Planet Nine, if it does exist, could be a super-Earth beyond the Sola... | https://en.wikipedia.org/wiki?curid=26903 |
1,886 | The orbits of Solar System planets are nearly circular. Compared to other systems, they have smaller orbital eccentricity. Although there are attempts to explain it partly with a bias in the radial-velocity detection method and partly with long interactions of a quite high number of planets, the exact causes remain und... | https://en.wikipedia.org/wiki?curid=26903 |
1,887 | Humanity's knowledge of the Solar System has grown incrementally over the centuries. Up to the Late Middle Ages–Renaissance, astronomers from Europe to India believed Earth to be stationary at the centre of the Universe and categorically different from the divine or ethereal objects that moved through the sky. Although... | https://en.wikipedia.org/wiki?curid=26903 |
1,888 | In the 17th century, Galileo publicized the use of the telescope in astronomy; he and Simon Marius independently discovered that Jupiter had four satellites in orbit around it. Christiaan Huygens followed on from these observations by discovering Saturn's moon Titan and the shape of the rings of Saturn. In 1677, Edmond... | https://en.wikipedia.org/wiki?curid=26903 |
1,889 | The term "Solar System" entered the English language by 1704, when John Locke used it to refer to the Sun, planets, and comets. In 1705, Halley realised that repeated sightings of a comet were of the same object, returning regularly once every 75–76 years. This was the first evidence that anything other than the planet... | https://en.wikipedia.org/wiki?curid=26903 |
1,890 | In the 20th century, humans began their space exploration around the Solar System, starting with placing telescopes in space. Since then, humans have landed on the Moon during the Apollo program; the Apollo 13 mission marked the furthest any human has been away from Earth at . All eight planets have been visited by spa... | https://en.wikipedia.org/wiki?curid=26903 |
1,891 | Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that suppo... | https://en.wikipedia.org/wiki?curid=15881 |
1,892 | Java was originally developed by James Gosling at Sun Microsystems. It was released in May 1995 as a core component of Sun Microsystems' Java platform. The original and reference implementation Java compilers, virtual machines, and class libraries were originally released by Sun under proprietary licenses. As of May 20... | https://en.wikipedia.org/wiki?curid=15881 |
1,893 | , Java 19 is the latest version, while Java 17, 11 and 8 are the current long-term support (LTS) versions. | https://en.wikipedia.org/wiki?curid=15881 |
1,894 | James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in June 1991. Java was originally designed for interactive television, but it was too advanced for the digital cable television industry at the time. The language was initially called "Oak" after an oak tree that stood outside Goslin... | https://en.wikipedia.org/wiki?curid=15881 |
1,895 | Sun Microsystems released the first public implementation as Java 1.0 in 1996. It promised write once, run anywhere (WORA) functionality, providing no-cost run-times on popular platforms. Fairly secure and featuring configurable security, it allowed network- and file-access restrictions. Major web browsers soon incorpo... | https://en.wikipedia.org/wiki?curid=15881 |
1,896 | In 1997, Sun Microsystems approached the ISO/IEC JTC 1 standards body and later the Ecma International to formalize Java, but it soon withdrew from the process. Java remains a "de facto" standard, controlled through the Java Community Process. At one time, Sun made most of its Java implementations available without cha... | https://en.wikipedia.org/wiki?curid=15881 |
1,897 | On November 13, 2006, Sun released much of its Java virtual machine (JVM) as free and open-source software (FOSS), under the terms of the GPL-2.0-only license. On May 8, 2007, Sun finished the process, making all of its JVM's core code available under free software/open-source distribution terms, aside from a small por... | https://en.wikipedia.org/wiki?curid=15881 |
1,898 | Sun's vice-president Rich Green said that Sun's ideal role with regard to Java was as an "evangelist". Following Oracle Corporation's acquisition of Sun Microsystems in 2009–10, Oracle has described itself as the steward of Java technology with a relentless commitment to fostering a community of participation and trans... | https://en.wikipedia.org/wiki?curid=15881 |
1,899 | In January 2016, Oracle announced that Java run-time environments based on JDK 9 will discontinue the browser plugin. | https://en.wikipedia.org/wiki?curid=15881 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.