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SPHERES Internal Components
The Synchronized Position Hold Engage and Reorient Experimental Satellite (SPHERES) are a series of miniaturized satellites developed by MIT's Space Systems Laboratory for NASA and US Military, to be used as a low-risk, extensible test bed for the development of metrology, formation flight, rendezvous, docking and autonomy algorithms that are critical for future space missions that use distributed spacecraft architecture, such as Terrestrial Planet Finder and Orbital Express. Each SPHERES satellite is an 18-sided polyhedron, with a mass of about 4.1 kg and a diameter of about 21 cm. They can be used in the International Space Station as well as in ground-based laboratories, but not in the vacuum of space. The battery-powered, self-contained units can operate semi-autonomously, using -based cold-gas thrusters for movement and a series of ultrasonic beacons for orientation. The satellites can communicate with each other and with a control station wirelessly. The built ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three SPHERES On International Space Station
3 (three) is a number, numeral (linguistics), numeral and numerical digit, digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious and cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic numerals, Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A New Hope
''Star Wars'' (later retitled ''Star Wars: Episode IV – A New Hope'') is a 1977 American Epic film, epic space opera film written and directed by George Lucas, produced by Lucasfilm Ltd. and released by Twentieth Century-Fox. It is the first film in the ''Star Wars'' franchise and the fourth chronological chapter of the "Skywalker Saga". Set in Universe of Star Wars, a fictional galaxy under the rule of the tyrannical Galactic Empire (Star Wars), Galactic Empire, the film follows a group of freedom fighters known as the Rebel Alliance, who aim to destroy the Empire's ultimate weapon, the Death Star. When the rebel leader Princess Leia is captured by the Empire, Luke Skywalker acquires stolen architectural plans of the Death Star and sets out to rescue her while learning the ways of a metaphysical power known as "the Force" from the Jedi Master Obi-Wan Kenobi. The cast includes Mark Hamill, Harrison Ford, Carrie Fisher, Peter Cushing, Alec Guinness, Anthony Daniels, Kenny Bak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
