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Mars Aircraft
A Mars aircraft is a vehicle capable of sustaining powered flight in the atmosphere of Mars. So far, the Mars helicopter ''Ingenuity'' is the only aircraft ever to fly on Mars, completing 61 successful flights covering in 1 hour, 50 minutes and 54 seconds of flight time. It made the first powered flight on 19 April 2021, taking off from the surface. Previously, the experimental aircraft, NASA Mini-Sniffer, was considered for possible missions to fly in and study Mars' atmosphere, but that idea was abandoned. Aircraft may provide on site measurements of the atmosphere of Mars, as well as additional observations over extended areas. A long-term goal is to develop piloted Mars aircraft. Compared to Earth, the air on Mars is much thinner at the surface, with pressure less than 1% of Earth's at sea level, requiring a more efficient method to achieve lift. Offsetting that disadvantage, Mars air, mostly consisting of carbon dioxide (), is denser per unit of volume than Earth air, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surveyor 6
Surveyor 6 was the sixth lunar lander of the American uncrewed Surveyor program that reached the surface of the Moon. Surveyor 6 landed on the Sinus Medii. A total of 30,027 images were transmitted to Earth. This spacecraft was the fourth of the Surveyor series to successfully achieve a soft landing on the Moon, obtain post landing television pictures, determine the abundance of the chemical elements in the lunar soil, obtain touchdown dynamics data, obtain thermal and radar reflectivity data, and conduct a Vernier engine erosion experiment. Virtually identical to Surveyor 5, this spacecraft carried a television camera, a small bar magnet attached to one footpad, and an alpha-scattering instrument as well as the necessary engineering equipment. It landed on November 10, 1967, in Sinus Medii, 0.49 deg in latitude and 1.40 deg w longitude (selenographic coordinates)–the center of the Moon's visible hemisphere. The spacecraft accomplished all planned objectives. The successful comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mars Helicopter On Sol 46
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury. In the English language, Mars is named for the Roman god of war. Mars is a terrestrial planet with a thin atmosphere (less than 1% that of Earth's), and has a crust primarily composed of elements similar to Earth's crust, as well as a core made of iron and nickel. Mars has surface features such as impact craters, valleys, dunes and polar ice caps. It has two small and irregularly shaped moons, Phobos and Deimos. Some of the most notable surface features on Mars include Olympus Mons, the largest volcano and highest known mountain in the Solar System and Valles Marineris, one of the largest canyons in the Solar System. The Borealis basin in the Northern Hemisphere covers approximately 40% of the planet and may be a large impact feature. Days and seasons on Mars are comparable to those of Earth, as the planets have a similar rotation period and tilt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sky-Sailor
The Sky-Sailor is a concept for a robotic aircraft with embedded solar cells on its wings, conceived in 2004 by the Swiss Federal Institute of Technology in Zurich. It is hoped it would be able to study the Martian surface. Sky-Sailor would be an autonomous, solar-powered Mars aircraft that would fly for one Martian day of 24 hours and scan features on the surface of Mars. If this project is funded and developed, it would be able to take detailed pictures of Mars, especially in places where wheeled rovers can not go. Concept and design The challenge for the developers was to make a very light weight model, which was accomplished. After that, an autopilot had to be installed so a non-stop autonomous flight for 24 hours could be achieved. All this was tested with a scale model in a wind tunnel. Two major challenges for small autonomous aircraft for Mars are to keep the weight down, such as batteries and electronics, and designing the autonomous control systems for directing the fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coprates Chasma
Coprates Chasma () is a huge canyon in the Coprates quadrangle of Mars, located at 13.4° south latitude and 61.4° west longitude, part of the Valles Marineris canyon system. It is long and was named after a classical albedo feature name. It was named from the classical Greek name for the Dez River in Persia. Near 60° W is the deepest point of the Valles Marineris system (as well as its lowest point by elevation) at below the surrounding plateau. Eastward from here there is about a 0.03 degree upward slope before reaching the outflow channels, which means that if you filled the canyon with fluid, it would create a lake with a depth of before the fluid would overflow out onto the northern plains. Keith Harrison and Mary Chapman described strong evidence for a lake in the eastern part of Valles Marineris, especially in Coprates Chasma. It would have had an average depth of only 842 m—much smaller than the 5–10 km depth of parts of Valles Marineris. Still, its v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valles Marineris
Valles Marineris (; Latin for ''Mariner program, Mariner Valleys'', named after the ''Mariner 9'' Mars orbiter of 1971–72 which discovered it) is a system of canyons that runs along the Mars, Martian surface east of the Tharsis region. At more than long, wide and up to deep, Valles Marineris is one of the largest List of largest rifts and valleys in the Solar System, canyons of the Solar System, surpassed in length only by the rift valleys of the mid-ocean ridge system of Earth. Valles Marineris is located along the equator of Mars, on the east side of the Tharsis Bulge, and stretches for nearly a quarter of the planet's circumference. The canyon system starts in the west with Noctis Labyrinthus; proceeding to the east are Tithonium Chasma, Tithonium and Ius Chasma, Ius chasmata, then Melas Chasma, Melas, Candor Chasma, Candor and Ophir Chasma, Ophir chasmata, then Coprates Chasma, then Ganges Chasma, Ganges, Capri Chasma, Capri and Eos Chasma, Eos chasmata; finally it emptie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reynolds Number
In fluid mechanics, the Reynolds number () is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the ratio between inertial and viscous forces. At low Reynolds numbers, flows tend to be dominated by laminar (sheet-like) flow, while at high Reynolds numbers flows tend to be turbulent. The turbulence results from differences in the fluid's speed and direction, which may sometimes intersect or even move counter to the overall direction of the flow ( eddy currents). These eddy currents begin to churn the flow, using up energy in the process, which for liquids increases the chances of cavitation. The Reynolds number has wide applications, ranging from liquid flow in a pipe to the passage of air over an aircraft wing. It is used to predict the transition from laminar to turbulent flow and is used in the scaling of similar but different-sized flow situations, such as between an aircraft model in a wind tunnel and the full-size ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARES Soaring Over Mars
Ares (; grc, Ἄρης, ''Árēs'' ) is the Greek god of war and courage. He is one of the Twelve Olympians, and the son of Zeus and Hera. The Greeks were ambivalent towards him. He embodies the physical valor necessary for success in war but can also personify sheer brutality and bloodlust, in contrast to his sister, the armored Athena, whose martial functions include military strategy and generalship. An association with Ares endows places, objects, and other deities with a savage, dangerous, or militarized quality. Although Ares' name shows his origins as Mycenaean, his reputation for savagery was thought by some to reflect his likely origins as a Thracian deity. Some cities in Greece and several in Asia Minor held annual festivals to bind and detain him as their protector. In parts of Asia Minor, he was an oracular deity. Still further away from Greece, the Scythians were said to ritually kill one in a hundred prisoners of war as an offering to their equivalent of Ares. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perseverance (rover)
''Perseverance'', nicknamed ''Percy'', is a car-sized Mars rover designed to explore the Jezero crater on Mars as part of NASA's Mars 2020 mission. It was manufactured by the Jet Propulsion Laboratory and launched on July 30, 2020, at 11:50 UTC. Confirmation that the rover successfully landed on Mars was received on February 18, 2021, at 20:55 UTC. As of , ''Perseverance'' has been active on Mars for sols ( Earth days, or ) since its landing. Following the rover's arrival, NASA named the landing site Octavia E. Butler Landing. ''Perseverance'' has a similar design to its predecessor rover, ''Curiosity'', although it was moderately upgraded. It carries seven primary payload instruments, nineteen cameras, and two microphones. The rover also carried the mini-helicopter '' Ingenuity'' to Mars, an experimental aircraft and technology testbed that made the first powered flight on another planet on April 19, 2021. As of December 22, 2022, it has made 37 successful flights. '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MELOS
Milos or Melos (; el, label=Modern Greek, Μήλος, Mílos, ; grc, Μῆλος, Mêlos) is a volcanic Greek island in the Aegean Sea, just north of the Sea of Crete. Milos is the southwesternmost island in the Cyclades group. The ''Venus de Milo'' (now in the Louvre) and the ''Asclepius of Milos'' (now in the British Museum) were both found on the island, as were a Poseidon and an archaic Apollo now in Athens. Milos is a popular tourist destination during the summer. The municipality of Milos also includes the uninhabited offshore islands of Antimilos and Akradies. The combined land area is and the 2021 census population was 5193 inhabitants. History Obsidian (a glass-like volcanic rock) from Milos was a commodity as early as 15,000 years ago. Natural glass from Milos was transported over long distances and used for razor-sharp "stone tools" well before farming began and later: "There is no early farming village in the Near East that doesn't get obsidian". The mining o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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