Search results
Results from the WOW.Com Content Network
The plaque attached to Pioneer 10. The Pioneer plaques are a pair of gold - anodized aluminum plaques that were placed on board the 1972 Pioneer 10 and 1973 Pioneer 11 spacecraft, featuring a pictorial message, in case either Pioneer 10 or 11 is intercepted by intelligent extraterrestrial life. The plaques show the nude figures of a human male ...
A hydrogen atom with proton and electron spins aligned (top) undergoes a flip of the electron spin, resulting in emission of a photon with a 21 cm wavelength (bottom) The hydrogen line, 21 centimeter line, or H I line[ a ] is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms.
Harold Irving Ewen. Harold Irving "Doc" Ewen (March 5, 1922 – October 8, 2015) was an American physicist, radio astronomer, and business executive. He served in the United States Navy in World War II as a second lieutenant. As a graduate student under Edward M. Purcell, he was the first to detect the galactic 21-cm hydrogen line .
The pulsar map and hydrogen molecule diagram are shared in common with the Pioneer plaque. The 116 images (one used for calibration) are encoded in analogue form and composed of 512 vertical lines. The remainder of the record is audio, designed to be played at 16 + 2 ⁄ 3 revolutions per minute.
For premium support please call: 800-290-4726 more ways to reach us
1834 – Benoît Paul Émile Clapeyron – Ideal gas law. 1836 – John Frederic Daniell invents a primary cell in which hydrogen is eliminated in the generation of the electricity. 1839 – Christian Friedrich Schönbein publishes the principle of the fuel cell in the "Philosophical Magazine". 1839 – William Robert Grove develops the Grove cell.
The heliosphere is the magnetosphere, astrosphere, and outermost atmospheric layer of the Sun. It takes the shape of a vast, tailed bubble-like region of space. In plasma physics terms, it is the cavity formed by the Sun in the surrounding interstellar medium. The "bubble" of the heliosphere is continuously "inflated" by plasma originating from ...
Pioneer 6, 7, 8, and 9 were space probes in the Pioneer program, launched between 1965 and 1969. They were a series of solar-orbiting, spin-stabilized, solar cell- and battery-powered satellites designed to obtain measurements on a continuing basis of interplanetary phenomena from widely separated points in space. [ 5 ]