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
PIX4580273: Star Trains - Orion Constellation at the Pic du Midi - Pic du Midi observatory - Orion star trails - The dome of the T60 faces the large constellation Orion. The curvature of the stars makes it possible to determine the Celestial Ecuador. Photographic pose of 30 minutes obtained in September 1995. T60 dome is facing Orion constellation on this 30 minutes exposure image. The long exposure enhances the colors of the stars / Bridgeman Images
PIX4580305: Star Trainees - Moon and Mars - Star trails - Moon and Mars reflection - Moon Sunrise with Mars (the bright star at the vertical of the red lighthouse is on the horizon). Photographic pose of 10 minutes obtained in June 2001. Moon and Mars (bright trail near the center) are reflecting on the water on this 10 minutes exposure image. June 2001 / Bridgeman Images
PIX4579139: Full Moon and Green Ray - Full moon and green flash - Full moon rise obtained on July 20, 2005. In the photo on the right, taken 20 seconds after the one on the left, a green ray is visible. Full moon rising; the picture on the left taken 20 seconds after the image on the right shows a green flash. July 20, 2005 / Bridgeman Images
PIX4579217: Total Eclipse of Moon 27 - 09 - 1996 - Total lunar eclipse September 27, 1996 - This montage illustrates the progression of the Moon in Earth's shadow cone. The image on the right corresponds to its complete entry into the shadow (beginning of the totalite), the central at the maximum of the totalite and the one on the left at the end of the totalite. During this eclipse, the southern pole of the Moon is passing a little above the center of the Earth's shadow cone. Thus, the southern pole of the Moon is the darkest, while the north pole is brighter. Note the color degrade for the right and left poses: from dark red towards the center of the shadow cone to white on the periphery of this cone, with an intermediate greenish orange degrade. This highlights the fact that blue is more diffuse than green by the Earth's atmosphere - hence the absence of blue on the image, because this color is lost in the Earth's atmosphere and therefore does not reach the surface of the Moon - and that green is more diffuse than red - or the absence of green in the heart of the shadow cone for the same reason as blue. This composite illustrates the Moon's progress in the Earth's shadow cone. The right picture corresponds to the complete entry in the shadow (beginning of the totality), the middle one to the maximum of the totality and the left one to the total's end. During this eclipse, the Moon's South Pole (the Moon's bottom in this picture) has pass a little above the Earth's shadow center. Then, the South Pole is darker than the North one (the upper part of the Moon). Notice the color gradient in the left and right exposures: from deep red toward the center of the shadow to the white in the shadow's outskirt, with intermediate orange greenish tints. It show that the blue is more scattered by the Earth's atmosphere than green, and that green is more scattered than red / Bridgeman Images
PIX4579594: Total Eclipse of Moon 20/02/2008 - February 20, 2008 Total Lunar Eclipse. - The Moon eclipse in the constellation Lion. To the left of the Moon, the Planet Saturn, to the right of the Moon, the star Regulus. 20 February 2008. February 20, 2008 Total Lunar Eclipse. The eclipsed Moon is seen below the Sickle in Leo, near Saturn and Regulus / Bridgeman Images
PIX4579602: Total Eclipse of Moon 20/02/2008 - February 20, 2008 Total Lunar Eclipse. - The Moon eclipse in the constellation Lion. To the left of the Moon, the Planet Saturn, to the right of the Moon, the star Regulus. 20 February 2008. February 20, 2008 Total Lunar Eclipse. The eclipsed Moon is seen below the Sickle in Leo, near Saturn and Regulus / Bridgeman Images
PIX4579641: Total Eclipse of Moon 21/02/2008 - Total lunar eclipse over a menhir - February 21 - The totally eclipsee Moon is overexposed, giving it the appearance of a huge orange star, close to the Regulus star in the constellation of the Lion, and accompanied at the top left by the Planet Saturn. The total lunar eclipse of february 21, 2008 seen over a menhir illuminated by a red light. Moon is seen overexposed, close to the star Regulus in Leo constellation. Planet Saturn is visible above left / Bridgeman Images
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