PIX4670642: Aurora boreale in Iceland - Jokulsarlon - Northern light above Lake Jokulsarlon in Iceland - Aurora boreale on the glacial lake of Jokulsarlon, located south of the Vatnajokull glacier in Iceland. April 2016 / Bridgeman Images

MDA4670764: La Pepiniere Paris Sante Cochin at Cochin Hospital, 24 rue du Faubourg Saint Jacques, Paris 75014. Realisation 2007, architect Dubus Richez architecture. Photography 28/09/07. / Bridgeman Images

MDA4670898: La Pepiniere Paris Sante Cochin at Cochin Hospital, 24 rue du Faubourg Saint Jacques, Paris 75014. Realisation 2007, architect Dubus Richez architecture. Photography 28/09/07. / Bridgeman Images

PIX4670923: Halo around the Sun - Sun Halo - Halos are due to the light of the Sun reflected by high-altitude clouds, cirrostratus, composed of ice crystals. They bend the light and cause a perfect circle around the Sun. Here we can see: - around the Sun, the halo of 22* radius, rather little contrast. - at the top of the halo of 22* radius, the upper arc tangent in the shape of a U evase. - above, “” parallele”” to the halo of 22* radius, the arc of Parry. - near the zenith, the arc cirucmzenithal, very colourful. Quimper Halos are caused by sunlight being refracted by cirro-stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter. In brief: - around the Sun, the 22* halo, not very contrasted. - atop the 22* halo, the upper tangent arc (a splayed U shape). - above it, “” parallel”” to the 22* halo, the Parry arc. - near the zenith, the cirucmzenithal arc, very colorful. October 28, 2006 Quimper (France) / Bridgeman Images

PIX4670961: Halo around the Sun and condensation train - Sun Halo and contrail. - Halos are due to the light of the Sun reflected by high-altitude clouds, cirrostratus, composed of ice crystals. They bend the light and thus cause a perfect circle around the Sun. 14 May 2006, Finistere. Halos are caused by sunlight being refracted by cirro - stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter. May 14, 2006 / Bridgeman Images

PIX4671060: Halo around the Sun - Sun Halo - Halos are due to the light of the Sun reflected by high-altitude clouds, cirrostratus, composed of ice crystals. They bend the light and cause a perfect circle around the Sun. Halos are caused by sunlight being refracted by cirro - stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter / Bridgeman Images

PIX4671315: Parhely - Sun dog - Parhelies are optical phenomena due to the interaction of solar light on ice crystals. Sundogs appear generally when the sun is low, and the atmosphere is filled with ice crystals forming cirrus clouds; they are caused by the refraction of sunlight passing through ice crystals / Bridgeman Images

PIX4671358: Parhely - Sun dog - Parhelies are optical phenomena due to the interaction of solar light on ice crystals. Sundogs appear generally when the sun is low, and the atmosphere is filled with ice crystals forming cirrus clouds; they are caused by the refraction of sunlight passing through ice crystals / Bridgeman Images

PIX4671130: Rainbow - Rainbow - Rainbow - Rainbow - Rainbow - fragmented sky appearing the Sun pierces through the clouds. 11 July 2008 Rainbow. July 11, 2008 / Bridgeman Images

PIX4671149: Rainbow at sunrise - Rainbow at sunrise - Arc - en - ciel observes 17 December 2005. At sunrise, the glowing light of the Sun caused an almost complete absence of blue and green colors in the rainbow. December 17, 2005. Rainbow seen at sunrise. Blue and green colors are almost invisible, because of this bright reddish sunshine / Bridgeman Images

PIX4671168: Rainbow - Rainbow - Rainbow - Arc - en - ciel tres colorore. 2 December 2008 Rainbow. December 2nd, 2008 / Bridgeman Images

PIX4671241: Rainbow Rainbow Double Rainbow Double Rainbow / Bridgeman Images

PIX4671563: Iridescent cloud - Iridescent cloud - Iridescent in clouds caused by drops of water of similar diameter. Irization is caused by diffraction of sunlight by small droplets in high altitude clouds / Bridgeman Images

PIX4671634: Noctulescent clouds - Noctilucent clouds - Noctilucent clouds, very high altitude clouds, photographs in July 2009 in Russia. These rare clouds are called noctilucent or “” night shining” as they seem to glow in the dark. They are caused by ice crystals at about 80 km altitude. These crystals reflect sunlight when the sun is well below the horizon. They are properly known as polar mesospheric clouds and are under intense study as it remains a mystery as to how they are formed. Image taken in july 2009 in Russia / Bridgeman Images

PIX4671650: Pollen crown - Pollen corona - Irisee crown around the Sun due to the presence of pollen in the atmosphere. Corona around the Sun created by the diffraction of light by pollen grains in the atmosphere / Bridgeman Images

PIX4671730: Lunar Halo - Lunar Halo - Lunar Halo. The ice crystals in the cirrus decompose the lunar light (in fact, the solar light reflected by the lunar surface) as small prisms and can give rise to a large coloured circle. Lunar halos are caused by moonlight being refracted by cirro - stratus clouds. These thin clouds are located very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo that is 44 degrees in diameter / Bridgeman Images

PIX4671779: Corona around the Moon - Corona around the Moon - When the light of the Moon passes through thin clouds of water droplets, it can create a moon crown of color. In meteorology, a lunar corona is produced by the diffraction of light from the Moon by small water droplets in a cloud / Bridgeman Images

PIX4671804: Clouds Altostratus undulatus - Altostratus undulatus clouds - Medium clouds, between 2000m and 5000 m. These undulated clouds are low altostratus / Bridgeman Images

PIX4671894: Clouds and sunset of Solei / Bridgeman Images

PIX4672998: Dominican Republic Shuttle View 10 - 2000 - Dominican Republic View by Space Shuttle STS 92 in October 200 / Bridgeman Images

PIX4673124: Mississippi Delta, Louisiana, seen by satellite - Mississippi River Delta. Louisiana - Mississpi Delta, Louisiana, USA, seen by Landsat-7 satellite, November 27, 1999. The Mississippi River drains the heart of the North American continent, carrying vast quantities of sediment and depositing it along the shore of Louisiana and into the Gulf of Mexico. The sediment is composed of topsoil, sand, dead and decaying plants, and anything else washed away by a strong rainstorm far upstream. Many of these effluents are nutrients that act as fertilizer for the microscopic plants (phytoplankton) living near the surface of the Gulf waters. Each summer the phytoplankton population explodes. As the phytoplankton age, die, and decompose, bacteria absorb oxygen dissolved in the water, creating a dead zone”” along the shore at the ocean bottom. The oxygen - poor water is deadly to animals, from the microscopic zooplankton that graze on phytoplankton to crustaceans, molluscs, and fish. Once infrequent, the Gulf of Mexico dead zone is now an annual event, triggered by phosphorus and nitrogen in fertilizers used on farms throughout the central United States and as far away as Saskatchewan, Canada. In the fall, strong winds from seasonal storms stir the water, mixing the oxygen - poor deep water with oxygen - rich surface water, bringing a reprieve until the next spring. The true - color image above was acquired on November 27, 1999, by the Enhanced Thematic Mapper plus (ETM +) aboard Nasa's Landsat 7 satellite. / Bridgeman Images

MDA4673155: Rehabilitation of social housing units, HBM group, 54-56 quai du Point du Jour, rue de Seine et Emile Duclaux, avenue Pierre Grenier a Boulogne Billancourt (Hauts de Seine). Construction 1932, architects Joseph Bassompierre (1871-1950), Paul de Rutte (1871-1943) and Paul Sirvin (1891-1977). Rehabilitation from 1992 to 1996 by Patrick Magendie. This complex consisted of approximately 1,000 houses on a plot of 27,500 square metres. The accommodation consists of a majority of three rooms and four rooms. The common rooms are open to the alcove kitchen, following which is installed the laundry room with sink, wash basin and shower! / Bridgeman Images

PIX4673161: Earth and Star Sky - Earth limb with starry sky - South-West United States and Star Sky. Artist view Earth limb with Florida peninsula and starry sky. Artwork / Bridgeman Images

PIX4673195: Pinacate Volcano, Mexico, seen by Landsat - 7 - Pinacate Volcano, Mexico, seen by Landsat satellite - 7 on 05/12/2002 / Bridgeman Images

PIX4673232: Earth from space: Baja California, Mexico - Baja California seen from space - Cloudy front on the Pacific Ocean and Baja California. Image obtained from shuttle Atlantis in May 2009. Clouds above Pacific ocean and Baja California seen from the space shuttle Atlantis in May 2009 / Bridgeman Images

TEC4673278: Social housing a Oullins (Rhone). End of construction 1988, architect Roland Castro. Photography 10/06/88. / Bridgeman Images

PIX4671467: Brocken Spectrum - Brocken Spectrum - Brocken Spectrum over Cirque de Mafate - Reunion Island Brocken Spectrum seen above Cirque de Mafate - Reunion, June 2011 / Bridgeman Images

PIX4671286: Rainbow - Rainbow - Rainbow - Sky observed in Brittany in November 2013 / Bridgeman Images

PIX4671379: Arc de fog - Fogbow - Arc de fog observed in Brittany on 5 May 2006. A haze arc is formed in the way of a rainbow. The light of the Sun is reflected in the water drops of the mist, but unlike raindrops, the mist droplets are much smaller: about a millimetre for the rain versus a few centiemes for the mist. As a result, the diffraction in the mist droplets is preponderant, which results in colour refracting at random angles, between 30 and 45* around the anti-sun point (opposite the Sun). Thus, all colours blend and one sees a white arch of light, sometimes slightly bluish on the inside and red on the outside, wider than a rainbow. Fogbow seen in Brittany on May 5, 2006. A fogbow is forming like a rainbow. The sunlight reflects in the fog droplets, but thoses droplets are much more smaller than the raindrops: about hundredths millimeters for the fog instead of about one millimeter for the rain. Thus, the diffraction in the fog droplets is leading, then the colors are refracted under angles between 30 and 45* around the antisolar point (at the opposite of the Sun). Then the colors mixe and one can see a white light bow, with sometime blue in the interior and red in the exterior, larger than a rainbo / Bridgeman Images

PIX4671727: Halo around the Moon - Lunar Halo - Halo around the Moon observes a few hours before the full Moon on January 10, 2009. The paper pencil-shaped ice crystals present in the cirrus form the lunar light (in fact, the solar light reflected by the lunar surface) as small prisms and can give birth to this large coloured circle (red inside and blue outside). Lunar halos are caused by moonlight being refracted by cirro - stratus clouds. These thin clouds are located very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo that is 44 degrees in diameter. January 10 2009 / Bridgeman Images

PIX4671507: Solar column - Solar pillar - A solar column is created by the reflection of solar light on the horizontal faces of ice crystals. A solar pillar is created by the reflection of a sunlight (when sun is at or low to the horizon) on the horizontal face of ice cristals / Bridgeman Images

PIX4671609: Iridescent clouds - Iridescent clouds - When parts of a cloud are very thin and contain water droplets of the same size, the diffraction of the solar light that passes through them can cause colour comparable to those of crowns. We are talking about iridescent or iridescent clouds. Irization is caused by diffraction of sunlight by small droplets in high altitude clouds / Bridgeman Images

PIX4672846: Los Angeles and the San Andreas Fault - Perspective view of the Los Angeles area, the San Gabriel Mountains and the Mojave Desert. Starting from the middle of the image, the San Andreas fault crosses the region to the bottom right of the image. View obtained by the satellite Landsat - 7 on 4 May 2001 combined with a radar image obtained by the SRTM instrument aboard the space shuttle Endeavour on 11 February 2000 / Bridgeman Images

PIX4672854: San Francisco Bay area view from space - San Francisco Bay area seen from space - San Francisco Bay area seen from space on April 21, 2002 from the International Space Station. Astronauts aboard the International Space Station (ISS) photographed the San Francisco Bay area on April 21, 2002. The gray urban footprint of San Francisco, Oakland, San Jose, and their surrounding suburbs contrast strongly with the green hillsides. Of particular note are the Pacific Ocean water patterns that are highlighted in the sun glint. Sets of internal waves traveling east impinge on the coastline south of San Francisco. At the same time, fresher bay water flows out from the bay beneath the Golden Gate Bridge, creating a large plume traveling westward. Tidal current channels suggest the tidal flow deep in the bay / Bridgeman Images

MDA4672904: Social housing in Paris 75018. Realisation 1991-1995, architect Christian Hauvette. / Bridgeman Images

PIX4672957: James Bay and Harricana River in winter - Canada - Ice - covered Hannah Bay - Canada - South James Bay with Harricana River in the south, seen in winter, February 12, 2000, from Space Shuttle Endeavour. St James Bay, Ontario, Shorelines. Numerous shorelines around Hudson and St. James Bays are distinctive in winter because of snow cover. The area shown in this Shuttle image taken on 12 February 2000 is located in Hannah Bay, in the southern part of St. James Bay. The river is the Harricanaw River (Harricana river). Shorelines along the bay were created when the overlying glaciers retreated and the land underneath rebounded causing the Hudson/St James Bay waters to retreat northward. These ridges are 100 to 200 m in width and heights can reach up to 7 m. The land along St. James Bay consists mainly of tidal flats and salt marshes / Bridgeman Images