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PIX4580075: Dunes near the north pole on Mars - Dunes at North Polar Cap on Mars: Image obtained on March 26, 2014 by the HIRISE camera on board the Mars Reconnaissance orbiter probe. HIRISE is a 50 cm telescope that observes visible and near infrared. Formative down-slope winds descending on Mars' North Polar ice cap likely play an important role in transporting sediment from the base of the ice cap into the dune fields that sit beyond the ice cap. The deep chasm that formed on the polar cap edge is identified as an area of strong down-slope winds and has a clear connection to Mars' largest dune field, Olympia Undae. Repeat HiRise images from this chasm that specifically targets the dunes, provides the basis to evaluate the sand fluxes which are associated with the dune and ripple movement in this area / Bridgeman Images
PIX4580080: The coldest place on Mars - Coolest place on Mars: Detail of the ice cap of the southern pole of Mars, composed mainly of carbon dioxide. This dry ice accumulates on the surface mainly in winter, the temperature of this area can sometimes drop to 130 degrees Celsius below zero. Image obtained on August 29, 2016 by the HIRISE camera on board the Mars Reconnaissance orbiter probe. HIRISE is a 50 cm telescope that observes visible and near infrared. The polar cap is made from carbon dioxide (dry ice), which does not occur naturally on the Earth. The circular pits are holes in this dry ice layer that expand by a few meters each Martian year. New dry ice is constantly being added to this landscape by freezing directly out of the carbon dioxide atmosphere or falling as snow. Freezing out the atmosphere like this limits how cold the surface can get to the frost point at -130 degrees Celsius (-200 F). Nowhere on Mars can ever get any colder this, making this coolest landscape on Earth and Mars combined / Bridgeman Images
PIX4580210: Circumpolar - Star trails around north celestial pole - Photographic pose around the polar star. Organ Pipe National Monument, Aizona, USA. The setting for this star trails photo is the pristine desert landscape of the Organ Pipe National Monument in Southern Arizona. The cactus in the foreground is a 25 foot tall Seguaro. Star trails are made by the combination of: the spinning of the Earth, the use of a stationary mount or tripod and a long exposure of the film. As the Earth spins, the stars begin to make concentric circles on the photograph. The closer stars are to Polaris, our North pole star, the smaller their circles. Thar farther away they are, the larger their circles / Bridgeman Images
PIX4581074: Circumpolar - South Hemisphere - Star trails around the south celestial pole - 10h30 photographic installation on 400 ISO film around the south celeste pole. Siding Spring's 3.9m telescope dome in the foreground. By pointing a camera towards the south (or to the north in the northern hemisphere) at night, we can record the paths of stars which never set. They appear to circle the apparent position of the Earth's axis of rotation projected on the sky. The elevation of this position above the local horizon indicates our local geographical latitude, about 30 degrees south at Siding Spring. The angle swept out by the arcs is an indication of the exposure time, which was about 10.5 hours on 400 ISO colour film. This kind of exposure is only possible from an extremely dark site / Bridgeman Images
PIX4581110: Circumpolar - South Hemisphere - South celestial pole star trails - Photographic pose of several hours around the south celeste pole. As the earth spins beneath the stars they appear to move across the sky from east to west. However, if one looks in the direction of the celestial poles, the stars appear to circle a single point on the sky. This is the position of the earth's axis of rotation projected into space. This picture was made from Siding Spring Observatory in Australia, so the pivotal point is 30 degrees above the northern horizon, which is the geographical latitude of Siding Spring. In the northern sky there is a bright star very close to the celestial pole. By contrast the region of the south celestial pole is barren / Bridgeman Images
PIX4581422: Star Line - The constellation of Orion - Star trails - The constellation of Orion - Because of the Earth's rotation, leaving the camera open, the stars advance towards the background of the sky. During the installation, gradually changing the focal length of the lens, the stars spread out and reveal their true color. Here is the constellation of Orion photographed in this way during a 30-minute installation in ISO 400. Here one sees the stars of the constellation of Orion recorded in an exposure of about 30 minutes, during which time the lens focus was moved from infinity to about 1 meter in a series of 10 steps about three minutes apart. The effect is to reveal the star colours and that of the vivid red Orion nebula / Bridgeman Images
PIX4581524: Zodiacal lights in the morning and evening - Zodiacal lights - morning and evening - The visible glow in the sky is called the zodiacal light. It comes from the reflection of the light of the Sun on the countless interplanetary dust; it draws the plane of the Solar System. At the top, on the morning of 1 November 2006, the light is tilted to the right (south); below, on 9 March 2007 at sunset, this light is tilted to the left (south). The faint cone of light extending from the horizon along the ecliptic is known as zodiacal light. It comes from the reflexion of the sun's light off tiny interplanetary dust particles in the plane of the solar system. Top, November 1st 2006 in the morning, zodiacal light is leaning right (south); bottom, March 9 2007, sunset, zodiacal light towards left (south) / Bridgeman Images
PIX4581560: The zodiacal light - The zodiacal light - The zodiacal light during astronomical dusk rises above the western horizon at the time of the spring equinox. It extends to the Pleiades. It comes from the reflection of the Sun's light on the countless interplanetary dust and draws the plane of the Solar System. Gers - France, 18/03/2009. The faint cone of light extending from the horizon along the ecliptic is known as zodiacal light. It comes from the reflexion of the sun's light off tiny interplanetary dust particles in the plane of the solar system. One can see it here from the bottom right of the image to beyond the Pleiades cluster near the center of the image. Gers, France. March 18, 2009 / Bridgeman Images
OMG4580708: The interior of the Palace of Parliament (1984) (formerly the House of the People) in Bucharest, Romania. The House of the People and the Boulevard of the Victory of the Socialist was inaugurated by Nicolas Ceaucescu on 25 June 1984. This pharaonic project is the second largest building in the world after the Pentagon - 45,000 m2 of floor area, 400,000 m2 of living space. To build this palace, one fifth of the city was razed. The palace is now the palace of the parliament now serves as a chamber of deputes and senators. Photography 10/10/05., Petrescu, Anca (1949-2013) / Bridgeman Images
PIX4580735: Circumpolar and Niasar Temple - Circumpolar above Fire temple - Photographic pose showing the apparent rotation of stars around the polar star. Niasar Zoroastrist Temple. Iran. Northern stars trailing over this pre - Islamic fire temple in the village of Niasar, central Iran / Bridgeman Images