Milan

Milan has 14 sister cities:. Hazy conditions, atmospheric dust, and high humidity contribute to this atmospheric attenuation.
There are other stadiums and multiuse palaces located in the metropolitan area, the biggest being Monza Brianteo Stadium (18,000 seats), the PalaDesio (10,000) and Geas Stadium (8,500). During sunrise and sunset, sunlight is attenuated by a particularly long passage through Earth's atmosphere, and the direct Sun is sometimes faint enough to be viewed directly without discomfort or safely with binoculars. Milan and Lombardy are candidates for the Summer Olympic Games of 2016 (Milan-Lombardy 2016). Viewing the partially eclipsed Sun with the naked eye can cause permanent localized damage to the retina, resulting in small, permanent blind spots for the viewer.^[20] This is an especially insidious hazard for inexperienced observers and for children, because there is no immediate perception of pain and it is tempting to stare at the spectacle of the eclipsing Sun, compounding any damage. Many of the strongest Italian football players were born in Milan, in the surrounding metropolitan area, or in Lombardy: Valentino Mazzola, Renzo De Vecchi, Paolo Maldini, Giuseppe Meazza, Giacinto Facchetti, Gianni Rivera, Paolo Rossi, Luigi Riva, Gaetano Scirea, Giuseppe Bergomi, Walter Zenga, Antonio Cabrini, Roberto Donadoni, Gianluca Vialli, Silvio Piola, Virginio Rosetta, Giampiero Boniperti, Giuseppe Dossena, Gabriele Oriali, Giuseppe Signori, Ugo Locatelli, Giampiero Marini, Aristide Guarneri, Paolino Pulici, Marcello Lippi, Giovanni Trapattoni, Franco e Giuseppe Baresi, Luigi Cevenini, Virgilio e Giuseppe Fossati, Giovanni Ferrari... Each retinal cell that is exposed to the partially-eclipsed solar image thus receives about ten times as much light as it would looking at the normal, non-eclipsed Sun.

Both teams play at Giuseppe Meazza - San Siro Stadium (85,700). In the dim overall light, the pupil tends to dilate from about 2 mm to perhaps 6 mm diameter, increasing the eye's collecting area by a factor of nearly 10. Milan is the only city in Europe whose teams have won both the European Cup and the Intercontinental Cup. During partial eclipses, most sunlight is blocked by the Moon passing directly in front of the Sun, but the uncovered parts of the photosphere have the same surface brightness as during a normal day. Milan and Internazionale. The pupil is controlled by the total amount of light in the visual field, not by the brightest object in the field. Football is the most important sport in Italy, and Milan is home to 2 world-famous football teams: A.C. During partial eclipses of the Sun, another hazardous condition exists because of the way the eye responds to bright light.

Prices are based on time elapsed and distance traveled. Even brief glances at the midday Sun through unfiltered binoculars can cause permanent blindness.^[19]. All taxis are the same color: white. Viewing the Sun through unfiltered 7x50 mm binoculars can deliver as much as 2.5 watts of sunlight into each eye, over 300 times more power than naked eye viewing. Milan has an efficient Taxi service, operated by private companies and licensed by the City of Milan (Comune di Milano). Using a proper filter is very important as some improvised filters reduce visible light while passing either infrared or ultraviolet rays that can still damage the eye. The "Passante ferroviario" is an underground railway serving a couple of "S" lines and is very much like another subway line (and is even marked as such on subway maps), except that it is connected to the FNME and Trenitalia suburban networks. Suitable filters are available at welding supply shops and camera stores.

The Regional Railway Service ( "R"), instead, links Milan with the rest of Lombardy and the national railway system. Viewing the Sun through light-concentrating optics such as binoculars is hazardous without an attenuating (ND) filter to dim the sunlight. The Suburban Railway Service ( "S" Lines, a service similar to the French RER and German S-Bahn), composed of 8 suburban lines and 10 more scheduled for 2008, connects the "Greater Milan" to cities such as Como and Varese. Brief viewing of the full direct Sun with the naked eye is unpleasant but generally safe.^[18]. At the end of the work, the TAV station for Milan to the east will be:. Direct viewing of the Sun with the naked eye delivers about 4 milliwatts of sunlight to the retina that is in the solar image, heating it up and potentially (though not normally) damaging it. A line from Milan to Venice and then to Trieste is under construction. Looking directly at the Sun when it is high in the sky causes temporary bleaching of the photosensitive pigments in the retina, which makes phosphene visual artifacts and may cause temporary partial blindness.

The stations for the TAV (Treni ad Alta Velocità - High Speed Trains) will be:. Sunlight is very bright, and looking directly at the Sun is painful to the eyes. High speed train lines are under contruction all across Italy, and new lines will open from Milan to Rome and Naples, and from Milan to Torino. The energy stored in petroleum is thought to have been converted from sunlight by photosynthesis in the distant past. Three new stations for passenger service are under construction:. Photosynthesis by plants captures the energy of sunlight and converts it to chemical form (oxygen and reduced carbon compounds), while direct heating or electrical conversion by solar cells are used by solar power equipment to generate electricity or do other useful work. Milan is one of the most important railway hubs of Italy, and the 5 major stations of Milan are among Italy's busiest:. This energy can be harnessed through several natural and synthetic processes.

The local transportation authority (ATM) transported more than 600 million passengers in 2003 . Sunlight on the surface of Earth is attenuated by the Earth's atmosphere, so that less power arrives at the surface — closer to 1000 watts per directly exposed square meter in clear conditions when the Sun is near the zenith. 93 bus lines cover over 1,070 km between them. near Earth. Greater Milan also has one of the most extensive tramway systems in the world, with more than 286 km of track, and 20 lines. from the Sun, i.e. Lines 4 (linking downtown with Linate Airport) and 6 are in planning stages. It is about 1370 watts per square meter of area, one A.U.

Line 5 is also under construction, to be finished in the first half of 2008. The solar constant is the amount of power that the Sun deposits per unit area that is directly exposed to sunlight. Extensions of lines 1, 2 and 3 are under construction, to create more than 15 km of track with 10 new stations. Sunlight — that is, light radiated from the surface of the Sun — is thought to be the main source of energy near the surface of Earth. Raffaele Hospital with the Cascina Gobba station (M2). Thus, the Sun was considered by Greek astronomers to be one of the seven planets (Greek planetes "wanderer"), after which the seven days of the week are named in some languages. Raffaele", connecting the S. With respect to the fixed stars, the Sun appears from Earth to revolve once a year along the ecliptic through the zodiac.

There is also a light metro-service, "Metrò S. It was only after Einstein's theory of mass-energy convertibility in the early 20th century that it was finally understood that the sun runs on nuclear fusion and is billions of years old, with several other billion to go. Milan has 3 subway lines (M1 - red, M2 - green, M3 - yellow) and the system, called Milan Metro - "M", running for more than 80 km. In the early years of the modern scientific era, it was proposed that the Sun extracted its energy from friction of its gas masses, which would yield a Sun no older than a few million years, with a few more million years to go. The main 3 airports of Milano (Malpensa, Linate and Orio) comprise the largest and most important hub in Italy, both for passengers and cargo. For teaching this heresy he was imprisoned by the authorities and sentenced to death (though later released through the intervention of Pericles). Vergiate, Bresso, and Parma are further airports in the region. One of the first people in the Western world to offer a scientific explanation for the sun was the Greek philosopher Anaxagoras, who reasoned that it was a giant flaming ball of metal even larger than the Peleponessus, and not the chariot of Helios.

A third airport is Orio al Serio (BGY), close to the city of Bergamo. In many prehistoric and ancient cultures, the Sun was thought to be a deity or other supernatural phenomenon. Babila). Mankind's most fundamental understanding of the Sun is as the luminous disk in the heavens whose presence above the horizon creates day, and whose absence causes night. Milan also has the Linate Airport (LIN) within the city limits (for European and domestic traffic), connected with bus line 73 (from S. This stellar evolution scenario is typical of low to medium mass stars. Malpensa was designed by the famous Ettore Sottsass. The Sun will then evolve into a white dwarf, slowly cooling over eons.

The city has a large international airport known as Malpensa International Airport (MXP), located in the northern suburb of Busto Ariszio and connected to the downtown with the "Malpensa Express" railway service (from Cadorna Station). Following the red giant phase, giant thermal pulsations will cause the Sun to throw off its outer layers forming a planetary nebula. In the church Santa Maria delle Grazie can be found one of the most famous paintings of Leonardo da Vinci: The Last Supper (it: "Cenacolo"). While it is likely that the expansion of the outer layers of the Sun will reach the current position of Earth's orbit, recent research suggests that mass lost from the Sun earlier in its red giant phase will cause the Earth's orbit to move further out, preventing it from being engulfed. The city is also the home of the Brera Academy of Fine Arts. Helium fusion will begin when the core temperature reaches about 3×10⁸ K. The Biblioteca Ambrosiana contains drawings and notebooks by Leonardo da Vinci among its vast holdings of books, manuscripts, and drawings, and is one of the main repositories of European culture. Instead, in 4-5 billion years it will enter its red giant phase, its outer layers expanding as the hydrogen fuel in the core is consumed and the core contracts and heats up.

Milan is one of the most important centres in the world for Opera lirica, with its famous Teatro alla Scala (La Scala, theatre). Our Sun does not have enough mass to explode as a supernova, and its mass is below the Chandrasekhar limit. Cities in the 'World City Network'" (Key Findings, Full Report). This is suggested by a high abundance of heavy elements such as iron, gold and uranium in the solar system: the most plausible ways that these elements could be produced are by endothermic nuclear reactions during a supernova or by transmutation via neutron absorption inside a massive first generation star. Lang of the Brookings Institution in the economic report "U.S. The Sun is thought to be a second-generation star, whose formation may have been triggered by shockwaves from a nearby supernova. Taylor and Robert E. It returned to Earth in 2004 and is undergoing analysis, but it was damaged by crash-landing when its parachute failed to deploy on reentry to Earth's atmosphere.

Milan was included in a list of ten "Alpha world cities" by Peter J. A solar wind sample return mission, Genesis, was designed to allow astronomers to directly measure the composition of solar material. This new fairground, in the north-western suburb of Pero and Rho (opened in April 2005), is Europe's largest open construction project, making Fiera Milano the largest trade fair complex in the world. Elemental abundances in the photosphere are well known from spectroscopic studies, but the composition of the interior of the Sun is much less well known. Fiera Milano, the city's Exhibition Center and Trade Fair complex, is one of the most important in the world. It has proved so useful that a follow-on mission, the Solar Dynamics Observatory, is planned for launch in 2008. Milan is the centre of much finance, the seat of the Italian Stock Exchange (la Borsa Valori) and its hinterland is an avant-garde industrial area. Originally a two-year mission, SOHO is now over ten years old (as of late 2005).

The city is 85% Italian, 4% from other EU countries, and the remainder include Romanian, Egyptian, Filipino, Sri Lankan, Chinese, and Albanian. To obtain an uninterrupted view of the Sun, the European Space Agency and NASA cooperatively launched the Solar and Heliospheric Observatory (SOHO) on December 2, 1995. A small percentage comes from Latin America. The North/South swing in apparent angle is the main source of seasons on Earth. Many immigrants come from Asian and North African nations. The most obvious variation in the Sun's apparent position through the year is a North/South swing over 47 degrees of angle, due to the 23.5 degree tilt of the Earth, but there is an East/West component as well. Milan is a very diverse city, being the second largest city in Italy, but it is the most industrial and main financial centre of the country. The shape described by the Sun's position, considered at the same time each day for a complete year, is called the analemma, and resembles a figure 8, aligned along the North/South direction.

See also: Rulers of Milan. Observed from Earth, the path of the Sun across the sky varies throughout the year. After the war, the city was reconstructed and has again become an important financial and industrial centre of Italy. the interplanetary medium) in a magnetic field, induces electric currents which in turn generates magnetic fields, and in this respect it behaves like an MHD dynamo. When war in Italy was finally over, April 25, 1945, Milan was heavily damaged and entire neighborhoods such as Precotto and Turro were destroyed. Magnetohydrodynamic (MHD) theory predicts that the motion of a conducting fluid (e.g. In fact, Milan was part of Mussolini's Italian Social Republic puppet state, and an important command centre of the German Army stationed in Italy. But satellite observations show that it is about 100 times greater at around 10^-9 tesla.

The city was bombed even after Pietro Badoglio surrendered to the allied forces in 1943. If space were a vacuum, then the Sun's 10^-4 tesla magnetic dipole field would reduce with the cube of the distance to about 10^-11 tesla. As a critical industrial center of Italy, Milan was target of continuous carpet bombing during World War II. The plasma in the interplanetary medium is also responsible for the strength of the Sun's magnetic field at the orbit of the Earth being over 100 times greater than originally anticipated. In 1859 (after the second of the Wars of Italian Independence) Austrian rule was ended by the Kingdom of Sardinia (which transformed into the kingdom of Italy in 1861). The influence of the Sun's rotating magnetic field on the plasma in the interplanetary medium creates the largest structure in the Solar System, the Heliospheric current sheet. Milan eventually became one of the main centers of Italian nationalism, claiming independence and the unification of Italy. The magnetic field of the sun reverses once for each 11-year sunspot cycle.

After this period, Milan was part of the Kingdom of Lombardy-Venetia under Austrian rule. The solar activity cycle includes old magnetic fields being stripped off the Sun's surface starting from one pole and ending at the other. But the French Revolution and the Napoleonic Wars saw the city annexed into the French satellite states of the Cisalpine Republic, which later became the Kingdom of Italy. (See magnetic reconnection). In the 18th century Austria replaced Spain as Milan's overlord, because the Spanish line of Habsburgs died out. The differential rotation of the Sun's latitudes causes its magnetic field lines to become twisted together over time, causing magnetic field loops to erupt from the Sun's surface and trigger the formation of the Sun's dramatic sunspots and solar prominences. After trying to conquer the rest of northern Italy in the 15th century, Milan was conquered by France, and then later on by Austria (Habsburg), then given in the early 16th century to the Spanish Habsburg line to rule. This makes it possible for the Sun to rotate faster at its equator (about 25 days) than it does at higher latitudes (28 days near its poles).

During the Renaissance Milan was ruled by dukes of the Visconti and Sforza families, who had artists like Leonardo da Vinci and Bramante at their service. All matter in the Sun is in the form of gas and plasma due to its high temperatures. During the Plague of 1349 Milan was one of the few places in Europe that was untouched by the epidemic, but it was deeply affected by the plagues of 1402 (50,000 deaths), 1542 (80,000), 1576 (17,000) and 1629 (also known as Great Plague of Milan, 70,000 deaths). Others suggest that cosmic rays might strongly influence the Earth's climate, and that their flux was much higher in the early history of the solar system ^[17]. In the 11th century, after the Ostrogothic and Lombard periods, the city regained its importance and led other Italian cities in gaining semi-independence from the Holy Roman Empire. Some scientists have suggested that the young Earth's atmosphere contained much larger quantities of greenhouse gases such as carbon dioxide and/or ammonia than are present today ^[16]. His feast day is the 7th of Decmeber. In fact, the young Earth was actually warmer than it is today.

St Ambrose is now the Patron Saint of the city. However, the geologic record shows that the Earth has remained at a fairly constant temperature throughout its history. At that time Milan was the second largest city in Europe, with more than 300,000 inhabitants. Such a weak star would not have been able to sustain liquid water on the Earth's surface, and thus life should not have been able to develop. In the 4th century CE, at the time of the bishop Saint Ambrose and emperor Theodosius I, the city was briefly the capital of the Western Roman Empire. Theoretical models of the sun's development suggest that 3.8 to 2.5 billion years ago, during the Archean period, the Sun was only about 75 percent as bright as it is today. It is presumed Milan was originally founded by the Celts of Northern Italy around 600 BCE and was conquered around 222 BCE by the Romans, who gave it the name of Mediolanum. One possible candidate to explain coronal heating is continuous flaring at small scales ^[15], but this is still an open topic of investigation.

. Current research focus has therefore shifted towards flare heating mechanisms. Inhabitants of Milan are referred to as "Milanesi" and nicknamed "Meneghini". In addition, Alfven waves do not easily dissipate in the corona ^[14]. Milan is also famous for the Alfa Romeo motorcar and for its silk production. All waves except Alfven waves have been found to dissipate or refract before reaching the corona (^[12], ^[13]). Another famed product of the city is the traditional Christmas sweet cake called Panettone. Currently, it is unclear whether waves are an efficient heating mechanism.

Indeed the English word milliner is derived from the name of the city. ^[8], ^[9], ^[10], ^[11]. Milan is one of the world capitals of fashion, like New York City, Paris, London and Rome, and design. The other proposed mechanism is flare heating, in which magnetic energy is continuously built up by photospheric motion and released through magnetic reconnection in the form of solar flares and waves. The town is famous for fashion firms and shops (via Montenapoleone) and the Galleria Vittorio Emanuele on the Piazza Duomo, reputed to be the world's oldest shopping mall. These waves travel upward and dissipate in the corona, depositing their energy in the ambient gas in the form of heat. The province comprises 188 communes, ranging in population (2001) from Milan Municipality (1,308,311) to Nosate (638); the city of Milan has lost 113,084 inhabitants (8.3 percent), from 1991 to 2001. Two main mechanisms have been proposed to explain coronal heating: Wave heating, in which sound, gravitational and magnetohydrodynamic waves are produced by turbulence in the convection zone.

Its province lies in the western part of Lombardy; it covers an area of 1,982 km² and has a population of 3,839,818 (2004); in 1991, the population was 3,738,685. It is thought that the energy necessary to heat the corona is provided by turbulent motion in the convection zone below the photosphere. It comes from the Celtic Mid-lan (meaning "in the middle of the plain") and was known as Mediolanum by the Romans. The high temperature of the corona shows that it is heated by something other than the photosphere. Milan's name has for many centuries been recorded as Mailand, which is still the German name of the city today. Above it lies the solar corona with a temperature of one million kelvins. The metropolitan area, called the Città Regione (The City Region) claims more than 9.4 million inhabitants (this is an ambitious definition of Milan's metropolitan area, perhaps not very comparable with figures claimed for metros outside Italy). The optical surface of the Sun (the photosphere) is known to have a temperature of about 6,000 K.

The city proper has about 1,308,311 inhabitants (2004), but the population of the urban area including the hinterland is about 4 million and is called La Grande Milano (Greater Milan, 1,981 square kilometres). Thus, measurement and theory have been reconciled. Milan (Italian: Milano; Milanese dialect: Milán) is the main city in northern Italy, and is located in the plains of Lombardy, the most populated and developed region in Italy. It has recently been found that neutrinos have rest mass, and can therefore transform into harder-to-detect varieties of neutrinos while en route from the Sun to Earth in a process known as neutrino oscillation ^[7].
. Several neutrino observatories were constructed, including the Sudbury Neutrino Observatory and Kamiokande to try to measure the solar neutrino flux. Toronto, Canada. For some time it was thought that the number of neutrinos produced by the nuclear reactions in the Sun was only a third of the number predicted by theory, a result that was termed the solar neutrino problem.

Thessaloniki, Greece. The temperature of the corona is several megakelvins. Tel Aviv, Israel. The low corona, which is very near the surface of the Sun, has a particle density of 10¹¹/m³ (Earth's atmosphere near sea level has a particle density of about 2x10²⁵/m³). Tianjin, China. The corona merges smoothly with the solar wind that fills the solar system and heliosphere. Shanghai, China. The corona is the extended outer atmosphere of the Sun, which is much larger in volume than the Sun itself.

São Paulo, Brazil. It is called the chromosphere from the Greek root chroma, meaning color, because the chromosphere is visible as a colored flash at the beginning and end of total eclipses of the Sun. Saint Petersburg, Russia. Above the visible surface of the Sun is a thin layer, about 2,000km thick, that is dominated by a spectrum of emission and absorption lines. Osaka, Japan. This part of the Sun is cool enough to support simple molecules such as carbon monoxide and water which can be detected by their absorption spectra. Melbourne, Australia. It is about 4,000 K.

Lyon, France. The coolest layer of the Sun is the temperature minimum region about 500km above the photosphere. Frankfurt am Main, Germany. They can be viewed with telescopes operating across the electromagnetic spectrum, from radio through visible light to gamma rays. Dakar, Senegal. The parts of the Sun above the photosphere are referred to collectively as the solar atmosphere. Krakow, Poland. The photosphere has a particle density of about 10²³/m³ (this is about 1% of the particle density of Earth's atmosphere at sea level).

Chicago, Illinois, United States. Sunlight has approximately a black-body spectrum that indicates its temperature is about 6,000 K, interspersed with atomic absorption lines from the tenuous layers above the photosphere. Boston, Massachusetts, United States. Conversely, the visible light we see is produced as electrons react with hydrogen atoms to produce H^- ions. Birmingham, Great Britain, Birmingham's Partner City page. The change in opacity has to do with the decreasing amount of H^- ions, which absorb visible light easily. Bethlehem, Palestine. Above the photosphere, sunlight is free to propagate into space and its energy escapes the Sun entirely.

Radio 24. The visible surface of the Sun, the photosphere, is the layer below which the Sun becomes opaque to visible light. Radio 105. The turbulent convection of this outer part of the solar interior gives rise to a 'small-scale' dynamo that produces magnetic north and south poles all over the surface of the Sun. R101. The thermal columns in the convection zone form an imprint on the surface of the Sun, in the form of the solar granulation and supergranulation. Radio Deejay (National Hdq). Convective overshoot is thought to occur at the base of the convection zone, carrying turbulent downflows into the outer layers of the radiative zone.

Sky Italia (National Hdq). Once the material cools off at the surface, it plunges back downward to the base of the convection zone, to receive more heat from the top of the radiative zone. MTV (South-Europe Hdq). As a result, thermal convection occurs as thermal columns carry hot material to the surface (photosphere) of the Sun. RAI (Milan Regional Hdq). From about 0.7 solar radii to 1.0 solar radii, the material in the Sun is not dense enough or hot enough to transfer the heat energy of the interior outward via radiation. Mediaset (National Hdq). Because of this, it can take a photon nearly 1,000,000 years to reach the photosphere.

Focus (monthly). Heat is transferred by ions of hydrogen and helium emitting photons, which travel a brief distance before being re-absorbed by other ions. Explora (monthly). In this zone, there is no thermal convection: while the material grows cooler with altitude, this temperature gradient is slower than the adiabatic lapse rate and hence cannot drive convection. AnnaBella (weekly). From about 0.2 to about 0.7 solar radii, the material is hot and dense enough that thermal radiation is sufficient to transfer the intense heat of the core outward. Marie Claire (weekly). Neutrinos are also released in the fusion reactions in the core, but unlike photons they very rarely interact with matter, and so almost all are able to escape the Sun immediately.

Oggi (weekly). Upon reaching the surface after a final trip through the convective outer layer, the photons escape as visible light. TV Sorrisi & Canzoni (weekly). 65) to as little as 17,000 years [6]. La Settimana Enigmistica (weekly). Lewis, The Illustrated Encyclopedia of the Universe, Harmony Books, New York, 1983, p. Panorama (weekly). Estimates of the "photon travel time" range from as much as 50 million years (Richard S.

Metro (daily). The high-energy photons (gamma and X rays) released in fusion reactions take a long time to reach the Sun's surface, slowed down by the indirect path taken, as well as constant absorption and re-emission at lower energies in the solar mantle (see below). La Gazzetta dello Sport (daily, sports only). All of the energy of the interior fusion must travel through the successive layers to the solar photosphere, before it escapes to space. La Padania (daily). The core extends from the center of the Sun to about 0.2 solar radii, and is the only part of the Sun where an appreciable amount of heat is produced by fusion: the rest of the star is heated by energy that is transferred outward. Milano Finanza (daily). About 8.9×10³⁷ protons (hydrogen nuclei) are converted to helium nuclei every second, releasing energy at the matter-energy conversion rate of 4.26 million tonnes per second or 383 yottawatts (9.15×10¹⁶ tons of TNT per second).

Il Sole 24 Ore (daily). At the center of the Sun, where its density reaches up to 150,000 kg/m³ (150 times the density of water on Earth), thermonuclear reactions (nuclear fusion) convert hydrogen into helium, producing the energy that keeps the Sun in a state of equilibrium. Libero (daily). Computer modeling of the Sun is also used as a theoretical tool to investigate its deep layers. Il Giornale (daily). However, just as the study of the waves generated by earthquakes (seismology) can be used to study the interior structure of the Earth, helioseismology, the study of sound waves that travel through the Sun's interior, has also contributed greatly to our understanding of the Sun's structure. Il Giorno (daily). The solar interior is not directly observable and the Sun itself is opaque to electromagnetic radiation.

Corriere della Sera (daily). Most of the mass is within about 0.7 radii. Nuovo Giuriati - Rugby - 4,000. This is simply the layer above which the gases are too cool or too thin to radiate a significant amount of light. Agorà - Ice Hockey - 4,000. The Sun's radius is measured from centre to the edges of the photosphere. PalaLido - Basket - 5,000. Nevertheless, the Sun has a well-defined interior structure, described below.

Velodromo Vigorelli - Cycling, American Football - 12,000. The Sun does not have a definite boundary as rocky planets do, as the density of its gases drops off following an approximately exponential relationship with distance from the centre of the Sun. MazdaPalace - Basket, Volley - 13,500. The mass of the Sun is so comparatively great that the center of mass of the solar system is generally within the bounds of the Sun itself. Forum di Assago - Basket, Ice Hockey, Volley, Music - 13,000 to 16,000. Tidal effects from the planets do not significantly affect the shape of the Sun, although the Sun itself orbits the center of mass of the solar system, which is offset from the Sun's center mostly because of the large mass of Jupiter. Ippodromo del Galoppo - Horse Racing - 15,000. This is because the centrifugal effect of the Sun's slow rotation is 18 million times weaker than its surface gravity (at the equator).

Ippodromo del Trotter - Horse Racing - 16,000. The Sun is a near-perfect sphere, with an oblateness estimated at about 9 millionths, which means the polar diameter differs from the equatorial by about 10 km. Brianteo - Athletic, Football - 18,568. The astronomical symbol for the Sun is a circle with a point at its centre: . Arena Civica - Athletic, Rugby, Football, 30,000. Compared to the average movement of other stars in the area, the Sun is moving with a speed of 20 km/s toward the star Vega. San Siro - only football - 85,700. The orbital speed is 217 km/s, equivalent to one light year every 1400 years, and one AU every 8 days.

Autodromo Nazionale Monza - car and motorcycle racing - 137,000. The Sun orbits the center of the Milky Way galaxy at a distance of about 25,000 to 28,000 light-years from the galactic centre, completing one revolution in about 226 million years. Past winners include Tacchini, Kodes, Panatta, Barazzutti, Moreno, Borg, Smid, Lendl, Forget, Curier, Ivanisevic, Kafelnikov, and Coira. Its current age is thought to be about 4.5 billion years, a figure which is determined using computer models of stellar evolution, and nucleocosmochronology ^[5]. The central court has a capacity of 8000. The Sun has a predicted main sequence lifetime of about 10 billion years. It is the most important youth tournament in the world, and is played at the Milan Tennis Club. The Sun has a spectral class of G2V, with the G2 meaning that its color is yellow and its spectrum contains spectral lines of ionized and neutral metals as well as very weak hydrogen lines [3], and the V signifying that it, like most stars, is a "main sequence" star [4].

Every year, Milan hosts the Bonfiglio Trophy Under 18 Tennis Tournament. The Sun is classified as a main sequence star, which means it is in a state of "hydrostatic balance", neither contracting nor expanding, and is generating its energy through nuclear fusion of hydrogen nuclei into helium. They play at the Agora Stadium (capacity 4,500) during the regular season, and at the Forum during playoffs . . The Vipers Milano have won the last 4 national championships, the Alpenliga and several Coppa Italia, and are the leaders of that sport in Italy. See below for details. Different ice hockey teams from Milan have won 30 National Championships between them. Looking directly at the Sun can damage the retina and one's eyesight.