- 産業: Astronomy
- Number of terms: 6727
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Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission ...
The energy given to an electron by accelerating it through 1 volt of electric potential difference.
Industry:Astronomy
A term used in digital image processing to describe a unique, single picture element (or, a single data point on an image) which has a unique color (or brightness) value.
Industry:Astronomy
A unit of energy equal to a thousand electron volts (eV). According to the Bureau International des Poids et Mesures: "The electron volt is the kinetic energy acquired by an electron in passing through a potential difference of one volt in vacuum. The electron volt is often combined with the SI prefixes. "
Industry:Astronomy
The acquisition of information on some property of a target object or material without being in physical contact with it. In the broadest terms, this is done by using instruments or scanners to sense and record reflected or emitted energy from the target and then processing the data in order to better analyze and understand the property in question.
Industry:Astronomy
Sudden motion or trembling of Earth caused by the abrupt release of slowly accumulated elastic energy in rocks.
Industry:Astronomy
The degree to which fine details in an image are separated or resolved.
Industry:Astronomy
Fine-grained, dark-colored extrusive igneous rock with less than about 52 weight percent silica (SiO<sub>2</sub>). Because of its low silica content, basalt has a low viscosity (resistance to flow. ) Basalt is composed primarily of plagioclase feldspar and pyroxene; other minerals such as olivine and ilmenite are usually present. Basalt is the most common volcanic rock on the terrestrial planets.
Industry:Astronomy
Gamma rays are like the light we see with our eyes, the x-rays used to probe our bodies in search of problems, and the radio waves that our television sets translate into inane shows. The only difference among these types of electromagnetic radiation is the wavelengths of the waves and how fast they vibrate. Gamma rays are the most energetic (and vibrate the most); radio waves are the least energetic and vibrate the least.
Industry:Astronomy
A region of exceptional brightness in an atmospheric layer of the Sun, often associated with sunspots of complex magnetic fields.
Industry:Astronomy
Bodies ranging in size from meters up to hundreds of kilometers in diameter that formed during the process that formed the planets by accretion. Most planetesimals accreted to form the planets.
Industry:Astronomy
