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Geddes (crater)
Geddes is a crater on Mercury. It has a diameter of 84 kilometers. Its name was adopted by the International Astronomical Union (IAU) in 2010. Geddes is named for the Irish stained glass artist Wilhelmina Geddes, who lived from 1887 to 1955. Within Geddes is a relatively large irregular depression, making it a pit-floor crater The geology of Mercury is the scientific study of the surface, crust, and interior of the planet Mercury. It emphasizes the composition, structure, history, and physical processes that shape the planet. It is analogous to the field of terrestr .... Such pits are thought to be caused by volcanic activity. Antoniadi Dorsum cuts across Geddes crater. Hollows Hollows are present on the floor of Geddes crater, mostly at the rims of smaller craters within it, and along the rim of the central depression. Geddes crater interior EN1022540782M.jpg, The central depression of Geddes is irregular in shape and may be a collapse feature rather than an impact c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelmina Geddes
Wilhelmina Geddes ''HRUA'' (25 May 1887 – 10 August 1955) was an Irish stained glass artist who was an important figure within the Irish Arts and Crafts movement and also the twentieth century British stained glass revival. Notable works include windows at St Bartholomew's (Ottawa, Canada), St Peter's Church (Lampeter, Wales), and the King Albert Memorial Window, St Martin's Cathedral (Ypres, Belgium). Early life Wilhelmina Margaret Geddes was born on her maternal grandparent's farm at Drumreilly Cottage in Leitrim on 25 May 1887. She was the eldest of four children, three girls and a boy, of William Geddes (c.1852-1916) and his wife Eliza Jane Stafford (1863-1955). The family, who migrated to Ireland from Scotland, had mainly been farmers. Her father, a Methodist, who was born near his father's farm at Tandragee, County Armagh, emigrated to America as a young man, working as a labourer for the railway construction business. This served a useful purpose as he had worked as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mariner 10 Image 0027325
A sailor, seaman, mariner, or seafarer is a person who works aboard a watercraft as part of its crew, and may work in any one of a number of different fields that are related to the operation and maintenance of a ship. The profession of the sailor is old, and the term ''sailor'' has its etymological roots in a time when sailing ships were the main mode of transport at sea, but it now refers to the personnel of all watercraft regardless of the mode of transport, and encompasses people who operate ships professionally, be it for a military navy or civilian merchant navy, as a sport or recreationally. In a navy, there may be further distinctions: ''sailor'' may refer to any member of the navy even if they are based on land; while Seaman (rank), ''seaman'' may refer to a specific enlisted rank. Professional mariners Seafarers hold a variety of professions and ranks, each of which carries unique responsibilities which are integral to the successful operation of an ocean-going vesse ... [...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] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
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 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pit-floor Crater
The geology of Mercury is the scientific study of the surface, crust, and interior of the planet Mercury. It emphasizes the composition, structure, history, and physical processes that shape the planet. It is analogous to the field of terrestrial geology. In planetary science, the term ''geology'' is used in its broadest sense to mean the study of the solid parts of planets and moons. The term incorporates aspects of geophysics, geochemistry, mineralogy, geodesy, and cartography. Historically, Mercury has been the least understood of all the terrestrial planets in the Solar System. This stems largely from its proximity to the Sun which makes reaching it with spacecraft technically challenging and Earth-based observations difficult. For decades, the principal source of geologic information about Mercury came from the 2,700 images taken by the Mariner 10 spacecraft during three flybys of the planet from 1974 to 1975. These images covered about 45% of the planet’s surface, but m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antoniadi Dorsum
Antoniadi Dorsum is a ridge on Mercury at , and it is approximately 359 km in length. In 1976, it was named by the International Astronomical Union after Eugène Michel Antoniadi. Antoniadi Dorsum cuts across the crater Geddes. The same trend of ridges continues to the north, where it is called Endeavour Rupes near the crater Holbein, and beyond that it is called Victoria Rupes, which cuts across the crater Enheduanna Enheduanna ( sux, , also transliterated as , , or variants) was the priestess of the moon god Nanna (Sīn) in the Sumerian city-state of Ur in the reign of her father, Sargon of Akkad. She was likely appointed by her father as the leader of th .... References Ridges Surface features of Mercury {{crater-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hollows (Mercury)
Hollows are a landform on the planet Mercury, discovered during the '' MESSENGER'' mission that orbited the planet from 2011 to 2015. Hollows are typically clusters of rimless depressions with flat floors and haloes of bright (high albedo) material surrounding them. Hollows are thought to form by loss of volatiles from the surface by sublimation, caused by the intense solar radiation on the airless planet. They are some of the youngest features on Mercury. Hollows were first observed as bright areas within craters imaged by the Mariner 10 spacecraft in 1974, but the images were not of sufficient resolution to discern any detail. These craters include Balzac, Tyagaraja, Theophanes, Zeami, and Hopper.Dzurisin, D., 1977. Mercurian bright patches: Evidence for physio-chemical alteration of surface material? ''Geophysical Research Letters'', 4, 383-386, doi:10.1029/GL004i010p00383 The MESSENGER spacecraft imaged the rest of the planet, much of it at higher resolution and in co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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