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An elegant electrode configuration is the triple probe, [2] consisting of two electrodes biased with a fixed voltage and a third which is floating. The bias voltage is chosen to be a few times the electron temperature so that the negative electrode draws the ion saturation current, which, like the floating potential, is directly measured.
Bell's spaceship paradox is a thought experiment in special relativity. It was first described by E. Dewan and M. Beran in 1959 [1] but became more widely known after John Stewart Bell elaborated the idea further in 1976. [2] A delicate thread hangs between two spaceships initially at rest in the inertial frame S.
Corrosion in space is the corrosion of materials occurring in outer space.Instead of moisture and oxygen acting as the primary corrosion causes, the materials exposed to outer space are subjected to vacuum, bombardment by ultraviolet and X-rays, solar energetic particles (mostly electrons and protons from solar wind), and electromagnetic radiation. [1]
Bruce McCandless II free-floating in space more than 320 feet away from the Challenger space shuttle. Photo: Reuters. McCandless was the first person to spacewalk untethered on February 7, 1984 ...
The second investigation measured the degradation of more than 200 flexible materials in the space environment. The third experiment involved the PCSat-2 that provided a communications system and tested the Amateur Satellite Service off-the-shelf solution for telemetry command and control. MISSE-5 was the first active experiment of the MISSE ...
As of September 2023, the European Space Agency estimates 11,000 tons of space objects are orbiting Earth. That includes up to 36,500 pieces of debris greater than 10 cm, objects that could cause ...
It successfully carried science and technology experiments for about 5.7 years that have revealed a broad and detailed collection of space environmental data. LDEF's 69 months in space provided scientific data on the long-term effects of space exposure on materials, components and systems that has benefited NASA spacecraft designers to this day ...
Recently released photos of two NASA astronauts stranded aboard the International Space Station (ISS) have caused health concerns to rise. Although Sunita Williams and Barry Wilmore were ...
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