[85], Most Venusian surface features are named after historical and mythological women. [164] In Inanna's Descent to the Underworld, unlike any other deity, Inanna is able to descend into the netherworld and return to the heavens. Thereafter, the star will steadily diverge from the pair. [13], Because of its low mass, the interior of the star is completely convective,[29] causing energy to be transferred to the exterior by the physical movement of plasma rather than through radiative processes. [33], Because of Proxima Centauri's southern declination, it can only be viewed south of latitude 27N.[nb 8] Red dwarfs such as Proxima Centauri are too faint to be seen with the naked eye. All components of Alpha Centauri display significant proper motion against the background sky. Later, American astronomer Chester Smith Lyman observed a complete ring around the dark side of the planet when it was at inferior conjunction, providing further evidence for an atmosphere. [36] Some amateur and professional astronomers regularly monitor for outbursts using either optical or radio telescopes. Surface planetary habitability is thought to require orbiting at the right distance from the host star for liquid surface water to be present, in addition to various geophysical and geodynamical aspects, atmospheric density, radiation type and intensity, and the host star's plasma environment.[2]. Despite being the closest planet to the Sun at a distance of 36-million miles (58-million kilometres), Mercury is not the hottest planet in the solar system. Proxima Centauri is a small, low-mass star located 4.2465 light-years (1.3020pc) away from the Sun in the southern constellation of Centaurus. It was named after the king of the gods in Roman mythology. [44] For this reason, Alpha Centauri is sometimes considered as the second star to have its distance measured because Henderson's work was not fully acknowledged at first. But if it were 75 times more massive, it would have become another star! Venus is a primary feature of the night sky, and so has been of remarkable importance in mythology, astrology and fiction throughout history and in different cultures. [85], Proxima Centauri's flare outbursts could erode the atmosphere of any planet in its habitable zone, but the documentary's scientists thought that this obstacle could be overcome. He suggested this was due to a dense, yellow lower atmosphere with high cirrus clouds above it. Moreover, fewer than four in ten across regions, gender, racial/ethnic, education, and income groups would vote yes. Likely voters ages 18 to 44 (41%) are far more likely than older likely voters ages 45 and above (19%) to say they would vote yes. Mercury has been known for a long time because it is visible to the naked eye. Sources in the "Main source" column confirm the possibility of terrestrial composition. Uranus has an average surface temperature of minus 374 degrees Fahrenheit (minus 224 degrees Celsius). [112] This would be discounted if, for example, Alpha Centauri B happened to have gas giants orbiting Alpha Centauri A (or vice versa), or if Alpha Centauri A and B themselves were able to perturb comets into each other's inner systems as Jupiter and Saturn presumably have done in the Solar System. This results in reduced heat loss from the planet, preventing it from cooling and providing a likely explanation for its lack of an internally generated magnetic field. It was done to make sure that the potentially habitable moons are unharmed. Though it might disappear in the next hundred years, a new one will likely replace it. Alpha Centauri C is about 13,000AU (0.21ly; 1.910^12km) from Alpha Centauri AB, equivalent to about 5% of the distance between Alpha Centauri AB and the Sun. Thus, they may form a moving group of stars, which would indicate a common point of origin, such as in a star cluster.[55]. Giant storms on Jupiter are common and they often last for a very long time. If we combine all the seven other planets, Jupiter would still be twice as massive. [194], On 15 December 1970, Venera 7 became the first spacecraft to soft land on another planet and the first to transmit data from there back to Earth.[195]. [150] The phases are clearly visible in a 4" telescope. However, aside from hydrogen and helium, it largely contains water, ammonia, and methane. The impenetrable Venusian cloud cover gave science fiction writers free rein to speculate on conditions at its surface; all the more so when early observations showed that not only was it similar in size to Earth, it possessed a substantial atmosphere. In 2001, J. Garca-Snchez et al. [38] The activity level appears to vary[39] with a period of roughly 442 days, which is shorter than the solar cycle of 11 years. where "A catalog of Near Eastern Venus deities." [60], In Chinese astronomy, Nn Mn, meaning Southern Gate, refers to an asterism consisting of AlphaCentauri and EpsilonCentauri. It also has extreme pressure and storms like those in Jupiter. This relationship makes sure they never collide. Uranus is a big ball of gas just like Jupiter and Saturn. "Planet Facts The Planets In Order". [19], Proxima Centauri is a red dwarf, because it belongs to the main sequence on the HertzsprungRussell diagram and is of spectral class M5.5. On Venus, about 85% of the craters are in pristine condition. It orbits the Sun in 687 Earth days. The outer solar system is far colder than the inner solar system. Surface temperatures on Mars average at minus 80 degrees Fahrenheit (minus 60 degrees Celsius). The red planet got its name from the Roman god of war whose Greek equivalent is Ares. Allen can only surmise it may have been coined from the Greek letter beta () and Latin ungula 'hoof'. Neptunes tilt on its axis of rotation is 28 degrees, which is closely similar to the Earths. Auroras on Jupiter are the brightest in the solar system. With that size, we can put 11 Earths side by side along its equator. However, without an atmosphere to distribute temperature around the planet, nighttime temperatures drop as low as minus 290 degrees Fahrenheit (minus 180 degrees Celsius). [15][67] The observed maximum separation of these stars is about 22 arcsec, while the minimum distance is 1.7 arcsec. [131][133], NASA announced in 2017 that it plans to send a spacecraft to Alpha Centauri in 2069, scheduled to coincide with the 100th anniversary of the first manned lunar landing in 1969, Apollo 11. The Sun would appear as a yellow star of apparent magnitude +0.48, roughly the same as the average brightness of Betelgeuse from Earth. If the orbital eccentricity of this hypothetical planet is low, Proxima Centauri would move little in the planet's sky, and most of the surface would experience either day or night perpetually. Mathematics and Physical Sciences", "William Crabtree's Venus transit observation", "Mikhail Lomonosov and the discovery of the atmosphere of Venus during the 1761 transit", "A Spectrographic Investigation of the Rotation Velocity of Venus", "United States-Soviet Space Cooperation during the Cold War", "Venus Express Out Of Gas; Mission Concludes, Spacecraft On Death Watch", "The Origin of the Male and Female Symbols of Biology", "Acidic clouds of Venus could harbour life", "Could microbes be affecting Venus' climate? Another likely candidate is Alpha Centauri, Earth's nearest Sun-like star system 4.37 light-years away. [56], Proxima Centauri c is a candidate super-Earth or gas dwarf about 7 Earth masses orbiting at roughly 1.5 astronomical units (220,000,000km) every 1,900 days (5.2yr). Saturns biggest moon, Titan, is comparable to Earth. Uranus is the second-farthest planet from the Sun. It has been a common sky fixture ever since antiquity, so one is credited with its discovery. [16] The brightest magnitude occurs during crescent phase about one month before or after inferior conjunction. For one, a day there is roughly the same length as a day here on Earth. The Great Red Spot is a very large storm that could fit two to three Earths. [21] Its total luminosity over all wavelengths is 0.17% that of the Sun,[8] although when observed in the wavelengths of visible light the eye is most sensitive to, it is only 0.0056% as luminous as the Sun. ", "Imaging low-mass planets within the habitable zone of Centauri", Kevin Wagner's (lead author of paper?) Transits of Venus occur in cycles of 243years with the current pattern of transits being pairs of transits separated by eight years, at intervals of about 105.5years or 121.5yearsa pattern first discovered in 1639 by the English astronomer Jeremiah Horrocks. Atmospheric erosion by the solar wind could have led to the loss of most of Venus's water during the first billion years after it formed. [188] These three features are now the only ones on Venus that do not have female names. Galileo Galilei made the first telescopic observation of this small planet in the 17th century. Heimpel, W. 1982. The astronomer William Herschel discovered it in 1781 through a telescope. [60] It will then pass just north of the Southern Cross or Crux, before moving northwest and up towards the present celestial equator and away from the galactic plane. As a result, it would float if put in a very large bathtub! [126], Alpha Centauri is a likely first target for crewed or robotic interstellar exploration. Because of that, it has two nicknames: the evening star and the morning star. It rises just before sunrise and fades away when the much brighter Sun dominates the daytime sky. Current models predict billions of habitable worlds in the Milky However, the atmosphere is also depleted of radiogenic argon, a proxy to mantle degassing, suggesting an early shutdown of major magmatism. [57] Altitude is one of the few factors that affect Venusian temperature. Alpha Centauri B has no known planets: planet Bb, purportedly discovered in 2012, was subsequently found to likely not exist, and a separate transiting planet has yet to be confirmed. This alone would make it difficult for a human to walk through, even without the heat, pressure, and lack of oxygen. The Egyptians knew the morning star as Tioumoutiri and the evening star as Ouaiti. [17][18] A sub-Earth, Proxima Centaurid, orbits roughly 0.029AU (4.3millionkm) away every 5.1 days. The Earth is our home planet and the only one known where life exists. Read our post here if you want to learn more about why Mars is red. Conditions on the Venusian surface differ radically from those on Earth because its dense atmosphere is 96.5% carbon dioxide, with most of the remaining 3.5% being nitrogen. During that time, an extra day is added to the month of February. Since it is close to the Sun, the temperature on Mercury is extreme. It has an estimated minimum mass of 1.17 MEarth (Earth masses) and orbits approximately 0.049 AU from Proxima Centauri, placing it in the star's habitable zone.[82][83]. [28] The diameter of Venus is 12,103.6km (7,520.8mi)only 638.4km (396.7mi) less than Earth'sand its mass is 81.5% of Earth's. [86] Exceptions are Maxwell Montes, named after James Clerk Maxwell, and highland regions Alpha Regio, Beta Regio, and Ovda Regio. Using current spacecraft technologies, crossing the distance between the Sun and Alpha Centauri would take several millennia, though the possibility of nuclear pulse propulsion or laser light sail technology, as considered in the Breakthrough Starshot program, could make the journey to Alpha Centauri in 20 years. Alpha Centauri A has 1.1 times the mass and 1.5 times the luminosity of the Sun, while Alpha Centauri B is smaller and cooler, at 0.9 times the Sun's mass and less than 0.5 times its luminosity. Pliny the Elder credited the realization that they were a single object to Pythagoras in the sixth century BC,[170] while Diogenes Lartius argued that Parmenides was probably responsible for this discovery. [32] The star culminates each year at local midnight on 24 April and at local 9 p.m. on 8 June. Most of all, the tectonic plates are important to the carbon cycle of our planet. As such, Innes concluded that Proxima Centauri was the closest star to Earth yet discovered. The star's magnetic field is created by convection throughout the stellar body, and the resulting flare activity generates a total X-ray emission similar to that produced by the Sun. Venus orbits the Sun at a distance of 67-million miles (108-million kilometres). Equipped with seven scientific instruments, Venus Express provided unprecedented long-term observation of Venus's atmosphere. [4] Earth is included for comparison. In early May 2028, Alpha Centauri A will pass between the Earth and a distant red star, when there is a 45% probability that an Einstein ring will be observed. That means it makes three rotations for every two revolutions it completes around the Sun. With the exception of Uranus and Neptune, each of these planets can be seen unaided. According to the IAU, a dwarf planet meets the following criteria: Together with Pluto in the dwarf planet category are Ceres, Haumea, Makemake, and Eris. [83][85], Several lines of evidence point to ongoing volcanic activity on Venus. [58] This gives a speed with respect to the Sun of 32.4km/s (20.1mi/s), very close to the peak in the distribution of speeds of nearby stars. The first of these is that bright Star in the sterne of Argo which they call Canobus [Canopus]. The Empire is spread across the Milky Way galaxy and consists of almost 25 million planets settled exclusively by humans.For over 12 millennia the seat of imperial authority was located on the ecumenopolis of Trantor, whose population exceeded 40 billion, A 2020 paper refining Proxima b's mass excludes the presence of extra companions with masses above 0.6MEarth at periods shorter than 50 days, but the authors detected a radial-velocity curve with a periodicity of 5.15 days. Proxima Centauri is a member of the Alpha Centauri star system, being identified as component Alpha CentauriC, and is 2.18 to the southwest of the Alpha CentauriAB pair. Because the movements of Venus appear to be discontinuous (it disappears due to its proximity to the sun, for many days at a time, and then reappears on the other horizon), some cultures did not recognize Venus as a single entity;[164] instead, they assumed it to be two separate stars on each horizon: the morning and evening star. Neptune is the farthest planet from the Sun, yet it is not the coldest planet in the solar system. The other outer planets also have rings but none as breathtaking as Saturn. The sky on Mars looks reddish during the day and turns blue during sunsets. In fact, before 1978 the definition of a planet was not really necessary. Distance: 4,501,000,000 km (2,796,791,736 mi). For the distances between each of the planets, see our distances between planets calculator. Planet: Barnards Star b Discovered by: Ignasi Ribas, et al Date: Nov. 14, 2018 Key Facts: Barnard's Star b is the second-closest known exoplanet to Earth.The data indicate that the planet could be a super Earth, with a mass at least 3.2 times that of the Earth, which orbits its host star in roughly 233 days. [103] A theoretical study indicates that a radial velocity analysis might detect a hypothetical planet of 1.8MEarth in Alpha Centauri B's habitable zone. [68] Asteroseismic analyses that incorporate tight observational constraints on the stellar parameters for the Alpha Centauri stars have yielded age estimates of 4.850.5 Gyr,[69] 5.00.5 Gyr,[70] 5.2 1.9 Gyr,[71] 6.4 Gyr,[72] and 6.520.3 Gyr. [14] The pair orbit around a common centre with an orbital period of 79 years. [nb 6], Among the known stars, Proxima Centauri has been the closest star to the Sun for about 32,000years and will be so for about another 25,000years, after which Alpha Centauri A and Alpha Centauri B will alternate approximately every 79.91 years as the closest star to the Sun. The answer to this question is a highly controversial one. The variation causes observed changes in the speed of Venus's zonal winds and appears to rise and fall in time with the Sun's 11-year sunspot cycle.[61]. At a tiny fraction of the mass of Mercury, Pluto was clearly a body much smaller than any other planet. We have one Moon, which causes the tides in our oceans. A long-standing mystery of Venus observations is the so-called ashen lightan apparent weak illumination of its dark side, seen when the planet is in the crescent phase. [26][31] This makes the Venusian surface hotter than Mercury's, which has a minimum surface temperature of 53K (220C; 364F) and maximum surface temperature of 700K (427C; 801F),[32][33] even though Venus is nearly twice Mercury's distance from the Sun and thus receives only 25% of Mercury's solar irradiance. Ceres lies in the inner solar system in the asteroid belt. [111], Nuclear pulse propulsion might enable such interstellar travel with a trip timescale of a century, inspiring several studies such as Project Orion, Project Daedalus, and Project Longshot. With a quiescent apparent magnitudeof 11.13, it is too faint to be seen with the unaided eye. The convention for designating exoplanets is an extension of the system used for designating multiple-star systems as adopted by the International Astronomical Union (IAU). It has a lot of impact craters, some of them with distinct rays. And because of that, it takes thousands of years to orbit the Sun. Though not visible to the naked eye, Proxima Centauri is the closest star to the Sun at a distance of 4.24ly (1.30pc), slightly closer than Alpha Centauri AB. [29] It is the outer star of The Pointers or The Southern Pointers,[31] so called because the line through Beta Centauri (Hadar/Agena),[32] some 4.5 west,[31] points to the constellation Crux the Southern Cross. Its rocks and dust are rich in iron. Estimates place the probability of finding a habitable planet around Alpha Centauri A or B at roughly 75%. Because of Proxima Centauri's proximity to Earth, its angular diameter can be measured directly. [65], In 2017, a team of astronomers using the Atacama Large Millimeter/submillimeter Array reported detecting a belt of cold dust orbiting Proxima Centauri at a range of 14AU from the star. But Proxima Centauri is only currently the closest star. It would take 4.25 years for the information collected to be sent back to Earth.[113]. [131][132] The existence of Proxima Centauri b, announced by the European Southern Observatory (ESO) in August 2016, would be a target for the Starshot program. While the Earths atmosphere is 21% oxygen, it is only 0.13% on Mars. On other cratered bodies, such as Earth and the Moon, craters show a range of states of degradation. This enormous planet is a gas giant made up of hydrogen and helium. Because of that, it is often called Earths twin. However, other than size, the two are very different. Alpha Centauri (Latinized from Centauri and often abbreviated Alpha Cen or Cen) is a triple star system in the constellation of Centaurus. It is 12,104 km (7,521 mi) across, about the same size as Earth. [19], Prior to the discovery of Proxima Centauri b, the TV documentary Alien Worlds hypothesized that a life-sustaining planet could exist in orbit around Proxima Centauri or other red dwarfs. [78], In 2016, in a paper that helped to confirm Proxima Centauri b's existence, a second signal in the range of 60 to 500 days was detected. It got its name from Greek mythologys primal god of the sky. The second [Achernar] is in the end of Eridanus. It most likely formed somewhere else and was just captured later by Neptune. Robert T. A. Innes discovered Proxima Centauri in 1915 by blinking photographic plates taken at different times during a proper motion survey. Venus is the second planet from the Sun.It is sometimes called Earth's "sister" or "twin" planet as it is almost as large and has a similar composition. [44], Alternatively, Proxima Centauri may have been captured at a later date during an encounter, resulting in a highly eccentric orbit that was then stabilized by the galactic tide and additional stellar encounters. Permanent climate change on habitable planets by Avi Loeb, opinion contributor - 10/07/22 3:00 PM ET The views expressed by contributors are their own and not the view of The Hill He finds out that he is on a habitable planet, which shocks him enough to release Amy. Planet Facts The Planets In Order. [30] The mass of its atmosphere is 92 times that of Earth's, whereas the pressure at its surface is about 93 times that at Earth'sa pressure equivalent to that at a depth of nearly .mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}1km (58mi) under Earth's oceans. Despite being relatively far from the Sun, Venus experiences an average surface temperature of 864 degrees Fahrenheit (462 degrees Celsius). [145] About 10millionyears later, according to the study, another impact reversed the planet's spin direction and caused the Venusian moon gradually to spiral inward until it collided with Venus. Solar System Local Interstellar Cloud Local Bubble Gould Belt Orion Arm Milky Way Milky Way subgroup Local Group Local Sheet Virgo Supercluster Laniakea Supercluster KBC Void Observable universe UniverseEach arrow () may be read as "within" or "part of". They estimated that if it were a planetary companion, it would be no less than 0.29 Earth masses. This insulating effect would cause the mantle temperature to increase, thereby reducing the heat flux out of the core. The Ancient Egyptians and Greeks believed Venus to be two separate bodies, a morning star and an evening star. It is a cold world with temperatures around -195 C (-320 F). [125], To the Australian aboriginal Boorong people of northwestern Victoria, Alpha Centauri and Beta Centauri are Bermbermgle,[126] two brothers noted for their courage and destructiveness, who speared and killed Tchingal "The Emu" (the Coalsack Nebula). This list is incomplete, currently containing 34 exoplanets, 11 of which probably lie inside their star's habitable zone. [87], The first robotic space probe mission to Venus and any planet was Venera 1 of the Soviet Venera program launched in 1961, though it lost contact en route. [164][203][202] Theology professor Jeffrey Cooley has argued that, in many myths, Inanna's movements may correspond with the movements of the planet Venus in the sky. [105], Current estimates place the probability of finding an Earth-like planet around Alpha Centauri at roughly 75%. [24][25], In 2016, the Working Group on Star Names of the IAU,[13] having decided to attribute proper names to individual component stars rather than to multiple systems,[26] approved the name Rigil Kentaurus (/radl kntrs/) as being restricted to Alpha Centauri A and the name Proxima Centauri (/prksm sntra/) for Alpha Centauri C.[27] On 10 August 2018, the IAU approved the name Toliman (/tlmn/) for Alpha Centauri B. Venus is known as Kejora in Indonesian and Malaysian Malay. They may be composed primarily of silicate rocks and/or metals. [157] The 1874 transit is the subject of the oldest film known, the 1874 Passage de Venus. [156], The preceding pair of transits occurred in December 1874 and December 1882; the following pair will occur in December 2117 and December 2125. These planets are those closest to the Sun. Otherwise, all of the newly found objects would have to be called planets as well. [5][n 2][122] A day on Jupiter is only 10 hours longthe shortest in the solar system. It was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun. Its surface features are also named after women, both real and mythical. Until that time a planet simply meant a body in orbit around the Sun, that reflected sunlight, and was not a planetary moon, asteroid, or comet. "The Lick-Carnegie Exoplanet Survey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace Configuration". [136], Venus may have formed from the solar nebula with a different rotation period and obliquity, reaching its current state because of chaotic spin changes caused by planetary perturbations and tidal effects on its dense atmosphere, a change that would have occurred over the course of billions of years. [236] By late October 2020, re-analysis of data with a proper subtraction of background did not show a statistically significant detection of phosphine.[237][238][239]. [240] This indicates that there is only a remote chance that spacecraft-borne contamination could compromise investigations. Jupiter is the fifth planet from the Sun and the largest of all the solar system planets. have suggested that billions of years ago, Venus's atmosphere could have been much more like the one surrounding the early Earth, and that there may have been substantial quantities of liquid water on the surface. Proxima Centauri b is a terrestrial planet discovered in 2016 by astronomers at the European Southern Observatory (ESO). There are two parts of the Fermi paradox that rely on empirical evidencethat there are many potential habitable planets, and that humans see no evidence of life.The first point, that many suitable planets exist, was an assumption in Fermi's time but is now supported by the discovery that exoplanets are common. [42] Although the surface conditions on Venus are no longer hospitable to any Earth-like life that may have formed before this event, there is speculation on the possibility that life exists in the upper cloud layers of Venus, 50km (30mi) up from the surface, where the temperature ranges between 303 and 353K (30 and 80C; 86 and 176F) but the environment is acidic. The M5.5 class means that it falls in the low-mass end of M-type dwarf stars,[14] with its hue shifted toward red-yellow[20] by an effective temperature of ~3,000K.[9] Its absolute visual magnitude, or its visual magnitude as viewed from a distance of 10 parsecs (33ly), is 15.5. The planet has few impact craters, demonstrating that the surface is relatively young, at 300600million years old. Venus displays its largest size and "new phase" when it is between Earth and the Sun (at inferior conjunction). If Proxima Centauri was a later capture into the Alpha Centauri star system then its metallicity and age could be quite different to that of Alpha Centauri A and B. [87], The longitude of physical features on Venus are expressed relative to its prime meridian. Aside from spinning on its side, Uranus rotates from east to west (retrograde) just like Venus. Zuev Institute of Atmospheric Optics, "Sulfur Dioxide: Episodic Injection Shows Evidence for Active Venus Volcanism", "The Recent Evolution of Climate on Venus", Annual Review of Earth and Planetary Sciences, "Naming the Newly Found Landforms on Venus", "Surface brightness variations seen by VIRTIS on Venus Express and implications for the evolution of the Lada Terra region, Venus", "Have Venusian volcanoes been caught in the act? The orbit of Venus around the Sun is the closest to Earth's orbit, allowing them to approach each other at inferior conjunction closer than any other planet, at a synodic period of 1.6 years, while Mercury approaches them more often the closest. [219], The astronomical symbol for Venus is the same as that used in biology for the female sex: a circle with a small cross beneath. [171] Though they recognized Venus as a single object, the ancient Romans continued to designate the morning aspect of Venus as Lucifer, literally "Light-Bringer", and the evening aspect as Vesper,[172] both of which are literal translations of their traditional Greek names. This convection means that the helium ash left over from the thermonuclear fusion of hydrogen does not accumulate at the core but is instead circulated throughout the star. [104], Radial velocity measurements of Alpha Centauri B made with the High Accuracy Radial Velocity Planet Searcher spectrograph were sufficiently sensitive to detect a 4MEarth planet within the habitable zone of the star (i.e. Letters are given in order of each planet's discovery English explorer Robert Hues brought Alpha Centauri to the attention of European observers in his 1592 work Tractatus de Globis, along with Canopus and Achernar, noting: Now, therefore, there are but three Stars of the first magnitude that I could perceive in all those parts which are never seene here in England. It is in a 3:2 spin-orbit resonance. The only volcanic complex of this size on Earth is the Big Island of Hawaii. For example, an Earth-like planet at 1.25 AU from Cen A (with a revolution period of 1.34 years) would get Sun-like illumination from its primary, and Cen B would appear 5.7 to 8.6 magnitudes dimmer (21.0 to 18.2), 190 to 2,700 times dimmer than Cen A but still 150 to 2,100 times brighter than the full Moon. The 82 known moons range in different sizes and compositions. [98] It likely has lakes of molten lava and would be far too close to Alpha Centauri B to harbour life. ", Interactive 3D gravity simulation of the pentagram that the orbit of Venus traces when Earth is held fixed at the centre of the coordinate system, Gazetteer of Planetary Nomenclature: Venus, Faceted Application of Subject Terminology, https://en.wikipedia.org/w/index.php?title=Venus&oldid=1119855045, Astronomical objects known since antiquity, Short description is different from Wikidata, Wikipedia indefinitely move-protected pages, Wikipedia indefinitely semi-protected pages, All articles with specifically marked weasel-worded phrases, Articles with specifically marked weasel-worded phrases from March 2022, Articles containing Chinese-language text, Pages using Sister project links with default search, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 3 November 2022, at 19:39.
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