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Dome Illusion
In astronomical imaging and Earth imaging, the crater illusion, also known as the dome illusion or crater/dome illusion, is an optical illusion which causes impact craters and other depressions to appear raised as domes or mountains. It is believed to be caused by our being accustomed to seeing light from overhead. When some images are taken from orbit, the light from the sun is nearly horizontal. This is the only time shadows are seen. Our brains are tricked into thinking that the interior of the crater is above the surrounding terrain instead of below it. Examples In September 2015, NASA released an image from the space probe Dawn of the crater Occator on dwarf planet Ceres. Because of the position of the Sun at the time the image was taken, the walls of the crater may appear to be convex instead of concave. On the right is the same image rotated 180 degrees to change the position of the shadows and eliminate the illusion. In December 1968, the Apollo 8 mission took the pho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Imaging
Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, modern astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum photons over these long periods of time. Photography using extended exposure-times revolutionized the field of professional astronomical research, recording hundreds of thousands of new stars, and nebulae invisible to the human eye. Specialized and ever-larger optical telescopes were constructed as essentially big cameras to rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goclenius (crater)
Goclenius is a lunar impact crater that is located near the west edge of Mare Fecunditatis. It lies to the southeast of the lava-flooded crater Gutenberg, and north of Magelhaens. To the northwest is a parallel rille system that follow a course toward the northwest, running for a length of up to 240 kilometers. This feature is named the Rimae Goclenius. The rim of this crater is worn, distorted and irregular, having a somewhat egg-like outline. The crater floor has been covered in lava, and a rille cuts across the floor towards the northwest, in the same direction as the other members of the Rimae Goclenius. A similar rille lies across the floor of Gutenberg, and it is likely that these features were all formed at the same time, after the original craters were created. There is a low central rise located to the northwest of the crater's midpoint. The crater is named for Rudolf Goclenius, Jr. (1572–1621), German physician and professor of physics, medicine and mathematics. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Illusions
Within visual perception, an optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual percept that arguably appears to differ from reality. Illusions come in a wide variety; their categorization is difficult because the underlying cause is often not clear but a classification proposed by Richard Gregory is useful as an orientation. According to that, there are three main classes: physical, physiological, and cognitive illusions, and in each class there are four kinds: Ambiguities, distortions, paradoxes, and fictions. A classical example for a physical distortion would be the apparent bending of a stick half immerged in water; an example for a physiological paradox is the motion aftereffect (where, despite movement, position remains unchanged). An example for a physiological fiction is an afterimage. Three typical cognitive distortions are the Ponzo, Poggendorff, and Müller-Lyer illusion. Physical illusions are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2011 NASA Earth Observatory Image Of Tin Bider Crater Rotated
Eleven or 11 may refer to: *11 (number), the natural number following 10 and preceding 12 * one of the years 11 BC, AD 11, 1911, 2011, or any year ending in 11 Literature * ''Eleven'' (novel), a 2006 novel by British author David Llewellyn *''Eleven'', a 1970 collection of short stories by Patricia Highsmith *''Eleven'', a 2004 children's novel in The Winnie Years by Lauren Myracle *''Eleven'', a 2008 children's novel by Patricia Reilly Giff *''Eleven'', a short story by Sandra Cisneros Music *Eleven (band), an American rock band * Eleven: A Music Company, an Australian record label *Up to eleven, an idiom from popular culture, coined in the movie ''This Is Spinal Tap'' Albums * ''11'' (The Smithereens album), 1989 * ''11'' (Ua album), 1996 * ''11'' (Bryan Adams album), 2008 * ''11'' (Sault album), 2022 * ''Eleven'' (Harry Connick, Jr. album), 1992 * ''Eleven'' (22-Pistepirkko album), 1998 * ''Eleven'' (Sugarcult album), 1999 * ''Eleven'' (B'z album), 2000 * ''Eleven'' (Reamonn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA Earth Observatory ALI 2011 Image Of Tin Bider Crater
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA), to give the U.S. space development effort a distinctly civilian orientation, emphasizing peaceful applications in space science. NASA has since led most American space exploration, including Project Mercury, Project Gemini, the 1968-1972 Apollo Moon landing missions, the Skylab space station, and the Space Shuttle. NASA supports the International Space Station and oversees the development of the Orion spacecraft and the Space Launch System for the crewed lunar Artemis program, Commercial Crew spacecraft, and the planned Lunar Gateway space station. The agency is also responsible for the Launch Services Program, which provides oversight of launch operations and countdown management for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA Earth Observatory
NASA Earth Observatory is an online publishing outlet for NASA which was created in 1999. It is the principal source of satellite imagery and other scientific information pertaining to the climate and the Environment (biophysical), environment which are being provided by NASA for consumption by the general public. It is funded with public money, as authorized by the United States Congress, and is part of the EOS Project Science Office located at Goddard Space Flight Center. , NASA Earth Observatory has won the Webby Awards, Webby People's Voice Award in Education three times. There were a series of publicized images issued by the website in 2008, including imagery of clouds streaming over the Caspian Sea, dust storms curling off the coast of Morocco, the crumbling of the Wilkins Ice Shelf, Hurricane Bertha (2008), Hurricane Bertha, and others. See also * Earth observation ** Earth observation satellite * Space exploration References External links * NASA NASA onli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tin Bider Crater
Tin Bider ( ar, تين بيدر) is an impact crater that sits in dry, rugged terrain in Algeria. The crater was formed in the last 70 million years, perhaps in the late Cretaceous or early Tertiary Period. Spanning 6 kilometres, the crater sits at the southern end of a range of hills. The elevated position and concentric rings of Tin Bider suggest that its structure is complex. Massive sandstones attributable to the Lower Cretaceous, known throughout the Sahara, are only exposed in the craters centre, about 500 meters above its usual stratigraphic position. Because of the large prominence of ductile deformation, Tin Bider significantly differs from other craters. While there is yet no conclusive explanation for this unique condition, Tin Bider could provide important information toward a better understanding of large-scale impact cratering. Tin Bider Crater, Algeria.jpg, Natural-colour satellite image of Tin Bider Crater Tin-bider overview.png, Schematic map of Tin Bider impact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
March 2011 Image Of Spitteler And Holberg Craters Rotated
March is the third month of the year in both the Julian and Gregorian calendars. It is the second of seven months to have a length of 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of March. The March equinox on the 20 or 21 marks the astronomical beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere, where September is the seasonal equivalent of the Northern Hemisphere's March. Origin The name of March comes from '' Martius'', the first month of the earliest Roman calendar. It was named after Mars, the Roman god of war, and an ancestor of the Roman people through his sons Romulus and Remus. His month ''Martius'' was the beginning of the season for warfare, and the festivals held in his honor during the month were mirrored by others in October, when the season for these activities came to a close. ''Martius'' remained the first month of the Roman calendar year perhaps as lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MESSENGER
''MESSENGER'' was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for "Mercury Surface, Space Environment, Geochemistry, and Ranging", and a reference to the messenger god Mercury from Roman mythology. ''MESSENGER'' was launched aboard a Delta II rocket in August 2004. Its path involved a complex series of flybys – the spacecraft flew by Earth once, Venus twice, and Mercury itself three times, allowing it to decelerate relative to Mercury using minimal fuel. During its first flyby of Mercury in January 2008, ''MESSENGER'' became the second mission, after Mariner 10 in 1975, to reach Mercury. ''MESSENGER'' entered orbit around Mercury on March 18, 2011, becoming the first spacecraft to do so. It successfully completed its primary mission in 2012. Following two mission extensions, the spacecraft used the last of its maneuvering propellant to deo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holberg (crater)
Holberg is a crater on Mercury. Its name was adopted by the International Astronomical Union in 1976. Holberg is named for the Dano-Norwegian writer Ludvig Holberg Ludvig Holberg, Baron of Holberg (3 December 1684 – 28 January 1754) was a writer, essayist, philosopher, historian and playwright born in Bergen, Norway, during the time of the Dano-Norwegian dual monarchy. He was influenced by Humanism, ..., who lived from 1684 to 1754. Spitteler crater is due south of Holberg. References Impact craters on Mercury {{Mercury-planet-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury (planet)
Mercury is the smallest planet in the Solar System and the closest to the Sun. Its orbit around the Sun takes 87.97 Earth days, the shortest of all the Sun's planets. It is named after the Roman god ' ( Mercury), god of commerce, messenger of the gods, and mediator between gods and mortals, corresponding to the Greek god Hermes (). Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or the eastern horizon before sunrise, usually in twilight. At this time, it may appear as a bright star-like object, but is more difficult to observe than Venus. From Earth, the planet telescopically displays the complete range of phases, similar to Venus and the Moon, which recurs over its synodic period of approximately 116 days. The synodic proximity of Mercury to Earth makes Mercury most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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