- 업종: Aerospace
- Number of terms: 16933
- Number of blossaries: 2
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The Executive Branch agency of the United States government, responsible for the nation's civilian space program and aeronautics and aerospace research.
Downlink from a spacecraft that immediately indicates the state of the spacecraft as being one of several possible states by virtue of the presence and/or frequency of the subcarrier. See Chapter 10. Bel - Unit of ratio equal to ten decibels. Named in honor of telecommunications pioneer Alexander Graham Bell.
Industry:Aerospace
A modulation scheme in which data symbols are represented by a shift from one phase to another. See Chapter 10.
Industry:Aerospace
Based on the mean Earth-to-sun distance, 149,597,870 km. Refer to "Units of Measure" section for complete information.
Industry:Aerospace
For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.
Industry:Aerospace
El punto de la esfera celeste directamente arriba, 90 grados sobre el horizonte, para cualquier punto de la tierra; es el punto donde una plomada extendida hacia arriba que se cruzan la esfera celeste.
Industry:Astronomy
La hipotética materia primigenia, propuesto por george gamow, desde el que los elementos químicos que se han formado.
Industry:Astronomy
La posición en la esfera celeste ocupada por el sol alrededor del 21 de marzo cuando su camino en la eclíptica cruza el Ecuador Celeste va de sur a norte. Este punto también se llama el equinoccio de marzo y el primer punto de aries.
Industry:Astronomy
Also known as the "Geminids," the Geminid Meteor Shower is an annual meteor shower that occurs around December 13th-14th of each year. Unlike other meteor showers, which originate from the debris of passing comets, the Geminids are the visual debris stream of an object called 3200 Phaethon, which is presumed to be an asteroid in the Pallas family.
To date, NASA can not figure out why the Geminid Meteor Shower is as bright as it is, and thus the Geminids are a unique yearly occurrence in the world of astronomy.
Industry:Astronomy
