PIX4578533: Moonrise on Persepolis - Full moon rising, Persepolis, Iran - Moonrise on the door of the Nations in Persepolis in Iran. Full moon rising over the Gate of all nations at Persepolis / Bridgeman Images

ITR4578573: Jardins du chateau de Vaux Le Visomte (Vaux-Le-Vicomte) in Maincy (Seine et Marne). Architect Louis Le Vau (1612-1670), construction 1656-1659, gardens landscaped by Andre le Notre (1613-1700). / Bridgeman Images

PIX4578590: Church of St. Gevorg. Teheran, Iran - Moon and Saint Gevorg church. Tehran, Iran - Full Moon and Church of St. Gevorg (St. George). Teheran's bazaar. Iran. Full Moon and Saint Gevorg church. Tehran, Ira / Bridgeman Images

PIX4578605: Full Moon Night - Full Moon - Moon Dream, Abiuneh village, Kasha / Bridgeman Images

PIX4578623: Very Fine Moon Crescent - Photo obtained on April 9, 2005 of the 27,5-hour Moon / Bridgeman Images

PIX4578720: Crescent of Moon - Moon crescent - Photo obtained on October 16, 2009 two days before the new Moon. October 16, 2009. Two days before new Moon / Bridgeman Images

TEC4578892: The city of Carcassonne (Aude). Medieval city restored in the 19th century by Eugene Viollet Le Duc (1814-1879). / Bridgeman Images

TEC4571561: Rue de Montorgueil in Paris. / Bridgeman Images

PIX4571434: Comete vue de Mercure - Illustration - Comet seen from Mercury - Illustratio / Bridgeman Images

PIX4571438: Artist's view of the comete Hale - Bopp - Comet Hale - Bopp - Illustratio / Bridgeman Images

PIX4571607: Summer Triangle - Summer Triangle - The Summer Triangle is an asterism formed by the brilliant stars Deneb (at the top of the picture, in the Swan), Vega (on the right in the Lyre) and Altair (on the left, in the Eagle). Summer Triangle is an asterism made of three bright stars: Deneb (top in Cygnus, Vega (right in Lyra) and Altair (left in Aquila) / Bridgeman Images

TEC4571660: Rue de Montorgueil in Paris. / Bridgeman Images

PIX4571678: Shooting star rain - Perseides - Shooting star rain of the Perseid swarm seen on August 13, 2013. The Perseides are a rain of shooting stars associated with the comet Swift-Tuttle. Meteors as appeared in the sky during the peak hours of 2013 Perseid Meteor Shower / Bridgeman Images

TEC4571717: La Maison Doree, 20 boulevard des Italians in Paris. 1835 construction, architect Victor Lemaire. / Bridgeman Images

PIX4571758: Star Vega in the Lyre - Star Vega in infrared - Vega (Alpha Lyrae) is the main star of the constellation Lyra, located only 25.4 light years from the Sun. It is the second brightest star after Sirius in the northern hemisphere. It's seen here in infrared by the Spitzer space telescope. Observed in this wavelength, the dust cloud surrounding the star appears. Nasa's Spitzer Space Telescope captured these images of the star Vega, located 25 light years away in the constellation Lyra. Spitzer was able to detect the heat radiation from the cloud of dust around the star and found that the debris disk is much larger than previously thought. This side - by - side comparison, taken by Spitzer's multiband imaging photometer, shows the warm infrared glows from dust particles orbiting the star at wavelengths of 24 microns (on the left in blue) and 70 microns (on the right in red). Both images show a very large, circular and smooth debris disk. The disk radius extends to at least 815 astronomical units. (One astronomical unit is the distance from Earth to the Sun, which is 150 - million kilometers or 93 - million miles). Scientists compared the surface brightness of the disk in the infrared wavelengths to determine the temperature distribution of the disk and then refer the corresponding particle size in the disk. Most of the particles in the disk are only a few microns in size, or 100 times smaller than a grain of Earth sand. These fine dust particles originate from collisions of embryonic planets near the star at a radius of approximately 90 astronomical units, and are then blown away by Vega's intense radiation. The mass and short lifetime of these small particles indicate that the disk detected by Spitzer is the aftermath of a large and relatively recent collision, involving bodies perhaps as big as the planet Pluto. The images are 3 arcminutes on each side. North is oriented upward and east is to the left / Bridgeman Images

PIX4572039: Polaris - Illustration - Polaris System - Illustration - Polaris is a triple system composed of a supergiant star and two dwarf stars. It is a pulsating variable star, cepheide of low amplitude. This illustration shows the triple system of this star, Polaris A and Polaris Ab, and further on, his companion Polaris B. This is a view from within the Polaris triple star system. The North Star, Polaris A is a bright supergiant variable star.Just above Polaris is a small companion, Polaris Ab, which is 2 billion miles from Polaris. Much farther away, near the top of the illustration, is the wide companion Polaris B. Polaris B is located approximately 240 billion miles from Polaris A. The two companion stars are the same temperature as Polaris A, but are dwarf stars. The wide companion star is visible in small telescopes. It was first noticed by William Herschel in 1780. The close companion, Polaris Ab was known to exist from measurements of a wobble in Polaris, caused by the gravitational tug of its companion, but has only been seen directly now using Hubble / Bridgeman Images

TEC4572072: An artist's villa, Villa Seurat in Paris. Impasse privee lotie in the 30s to receive workshops of artists close to Montparnasse. A large number of villas are from Andre Lurcat and date back to 1924. / Bridgeman Images

TEC4572099: The rue des artistes in Paris. / Bridgeman Images

TEC4573199: View of the clouds towers, in Nanterre (Hauts de Seine). Architect Emile Aillaud (1902-1988), construction 1977. / Bridgeman Images

PIX4573429: Artist's view of a hot Jupiter HD 149026b - Exoplanet HD 149026b - Hot Jupiter - HD 149026b (in the background) is to date the hottest exoplanet in the universe. This warm Jupiter reaches a temperature of 2000 degrees; it absorbs almost all the light of its star and is therefore also the darkest planet in the universe. HD 149026b is located 256 years - light in the constellation Hercules. This artist's concept illustrates the hottest planet yet observed in the universe. This “” hot Jupiter”” called HD 149026b, is a sweltering 3,700 degrees Fahrenheit (2,040 degrees Celsius) - about 3 times hotter than the rocky surface of Venus, the hottest planet in our solar system. The planet is so hot that astronomers believe it is absorbing almost all of the heat from its star, and reflecting very little to no light. Objects that reflect no sunlight are black. Consequently, HD 149026b might be the blackest known planet in the universe, in addition to the hottest. HD 149026b is located 256 light - years away in the constellation Hercules. It is the smallest known transiting planet, with a size similar to Saturn's and a suspected dense core 70 to 90 times the mass of Earth. It speeds around its star every 2.9 days / Bridgeman Images

TEC4573453: La fontaine Agam a La defense (Hauts de Seine). / Bridgeman Images

PIX4573580: Inhabited Earth Type Exoplanete - Inhabited Earth Type Exoplanete - Artist View / Bridgeman Images

TEC4573621: Urban layout, the Terrasse de Nanterre and Puteaux (Hauts de Seine). It was not until the end of the 1990s that a real project to rehabilitate the entire territory linking the Arche to the Seine was evoked. In 2000, a Seine-Arche public facility (EPASA) was created under the supervision of the Ministry of Equipment. Its mission: to rehabilitate a 124 ha territory between the Grande Arche and the Seine declared of national interest, which will thus complete the historical axis of Le Notre (Louvre, Tuileries, Concorde, Champs-Elysees, Arc de Triomphe, Grande Arche). In November 2002, the project “Les Terrasse de Nanterre”, by urban planners Treuttel-Garcias-Treuttel, was chosen. It aims to transform three kilometres of vacant terrain, segmented by noisy road and rail infrastructures, into a humanise, green and economically dynamic space. A program that remains respectful of the popular identity of Nanterre: 40% of the dwellings built will be devoted to social housing. Photography 14/04/07. / Bridgeman Images

PIX4573770: Gl 581c: discovery of a habitable planet - Gl 581c: discovery of an habitable planet - Artist's view of the exoplanet Gliese 581c. Gliese 581c, with a radius of 1.5 times that of the Earth, is the first exoplanet gathering the necessary elements to imagine the existence of a possible extra-terrestrial life. From its surface, its star, about 100 times less bright than our Sun, must be large in the sky because of its proximity to the planet. In April 2007 the Geneva Observatory in Switzerland announced the discovery of a “super - earth”” extrasolar planet orbiting the red dwarf star Gliese 581. Dubbed Gliese 581 c, it's been called a super - earth because it is one of the few known extrasolar planets that has a mass near Earth's, and the only one to occupy its sun's “” habitable zone.”” Gliese 581 c is believed to be about five times more massive than the Earth with a diameter about half - again as large as Earth's. Depending upon the planet's composition, whether mostly rock or a combination of rock a water, a visitor would experience a surface gravity between 1.25 to 2.2 times the Earth's. Gliese 581 c is about 20 light years away, a “” next door neighbor”” in stellar terms, but far beyond the reach of human visitors with today's technology. There is special interest in Gliese 581 c because it is the only known extrasolar planet where liquid water - - a necessary ingredient for life as we know it - - could exist. Surface temperatures are believed to range between the freezing point of water to about 100* F. However, there are other factors that could affect these values, including the possibility that Gliese 581 c always keeps the same side facing its host star, with the result that one side would become extremely hot while the other extremely cold. In this image from the surface of Gliese 581 c, its red dwarf host hangs low in the sky over a rocky and watery terrain. This sun has a diameter and radius about a third that of the earth / Bridgeman Images

TEC4572232: The passage of hell in Paris 14th arrondissement. / Bridgeman Images

PIX4572243: Star field in the constellation Sagittarius - Scattered stars in Sagittarius: Stars in Sagittarius seen by the space telescope Hubble. This colourful and star-studded view of the Milky Way galaxy was captured when the NASA/ESA Hubble Space Telescope pointed its cameras towards the constellation of Sagittarius (The Archer). Blue stars can be seen scattered across the frame, set against a distant backdrop of red-hued cosmic companions. This blue litter most likely formed at the same time from the same collapsing molecular cloud. The colour of a star can reveal many of its secrets. Shades of red indicate a star much cooler than the Sun, so either at the end of its life, or much less massive. These low-mass stars are called red dwarfs and are thought to be the most common type of star within the Milky Way. Similarly, brilliant blue hues indicate hot, young, or massive stars, many times the mass of the Sun. A star's mass decides its fate; more massive stars burn brightly over a short lifespan, and die young after only tens of millions of years. Stars like the Sun typically have more sedentary lifestyles and live longer, burning for approximately ten billion years. Smaller stars, on the other hand, live life in the slow lane and are predicted to exist for trillions of years, well beyond the current age of the Universe / Bridgeman Images

PIX4572360: Variable star PV Cephei and nebula Gyulbudagyan - Variable star PV Cephei with Gyulbudagyan's nebula - PV Cephei is an excessively fast variable star, moving almost 20 km per second in the interstellar medium. This young star, formed about 500,000 years ago, is now more than 30 years ago - light from its birthplace, the cluster of stars of the Iris nebula, NGC 7023. PV Cephei is the small orange star with a gas cloud located in the upper left middle of the image. Image obtained on October 19, 2008 with a telescope measuring 61 cm in diameter. PV Cephei is a variable star moving at roughly 20 km/sec through the interstellar medium. This young star was formed about 500,000 years ago and is located now at about 30 light years from its birth place, the star cluster of Iris nebula (NGC 7023). PV Cephei is the small oranged star visible near the middle of the image, at right of the brilliant blue star. It is associated with a small cloud of gas. Image taken on October 19 2008 with a 24 - inch telescope / Bridgeman Images

TEC4572445: Artist workshop, 31 rue Campagne 1ere in Paris 14th arrondissement. Construction 1911, architect Andre Arfvidson (1870-1935), Gres d'Alexandre Bigot (1863-1927). Building prizes at the contest of facades in 1911 with the systematic appearance of duplex. / Bridgeman Images

PIX4572527: Brown dwarf with asteroid ring - Artist's view of a brown dwarf star surrounded by an asteroid belt. In the foreground, a primitive exoplanet illuminated by the star. This brown dwarf is host to a disk composed primarily of asteroids and boulders. The light from this dwarf is barely enough to illuminate the surface of this primitive planet. At a distance of about 1.5 million miles, the orbit of this planet is aligned to the plane of the rings with the result that they appear as a fuzzy line occulting the glowing face of this brown dwarf / Bridgeman Images

PIX4572591: Nova de l'Eagle - Nova Aquilae. Artwork - Artist's view of a nova, a white dwarf star that attracts the material of a companion star at the end of life, a red giant, and compresses these gases and then unleash a nuclear fusion reaction releasing a huge amount of energy in the form of a brief, extremely bright light. Here the artist showed the binary system just before the explosion of the nova. The artist's illustration depicts a classical nova binary system just before an explosion on the surface of the white dwarf. Classical novas occur in a system where a white dwarf closely orbits a normal, companion star. In this illustration, gas is flowing from the large red, companion star into a disk and then onto the white dwarf that is hidden inside the white area. As the gas flows ever closer to the white dwarf, it gets increasingly hotter, as indicated by the change in colors from yellow to white. When the explosion occurs, it engulfs the disk of gas and the red companion star / Bridgeman Images

PIX4572752: Artist's view of an eruptive star - Flare star - Artwork: DG Canum Venaticorum (DG CVN) is a binary star located in the constellation Hunting Dogs. On 23 April 2014, a powerful gamma eruption from this system was recorded by the Swift satellite. DG Canum Venaticorum (DG CVN) is a binary star system in the northern constellation of Canes Venatici. On 2014 April 23, 2014, a gamma-ray superflare event was observed by the Swift satellite coming from the position of this system. It may have been perhaps the most luminous such events ever observed coming from a red dwarf star / Bridgeman Images

PIX4572809: Artist's view of a magnetar and its magnetic field - A magnetar with its magnetic field. Artwork - Illustration showing the magnetic field lines of a magnetar. This artist's concept shows a magnetar - - a neutron star with a super - strong magnetic field, represented by the lines in this illustration / Bridgeman Images

PIX4572874: Artist's view of a proto - star - Birth of a Proto - star - A proto - star is a pile of dust and gas that contracts to form a star / Bridgeman Images

LBY4572880: The corner of the rue Faubourg Poissonniere with the rue de Paradis in the 10th in Paris Rue Faubourg Poissonniere - Rue de Paradis - Paris 10 - / Bridgeman Images

TEC4572206: Artist workshop, Avenue Reille in Paris 14th arrondissement. / Bridgeman Images

PIX4574271: Galaxy NGC 891 in Andromede - Edge-on spiral galaxy NGC 891 in Andromeda: Spiral galaxy seen by the slice located at a distance of 10 million light-years. Composite image. Located about 10 million light years from Earth, NGC 891 is one of the most photographed edge-on spiral galaxies in the northern skies. Composite Image made from multiple data sources. / Bridgeman Images