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1) Angular distance from the north point eastward to the intersection of the celestial horizon with the vertical circle passing through the object and the zenith. 2) Directional bearing around the horizon, measured in degrees from north (0 degree.)
Industry:Astronomy
Decrease in the intensity of radiation, representing energy converted into excitation or ionization of electrons in the region through which the radiation travels. As contrasted with monochromatic scattering (in which reemission occurs in all directions at the same frequency), the inverse process of emission refers to radiation that is reemitted in general in all directions and at all frequencies.
Industry:Astronomy
Temperature measured on the Kelvin scale: 0 Kelvin = -273.15 degree Celsius. Absolute temperature is directly related to (kinetic) energy via the equation E = kBT, where kB is Boltzmann's constant. So, a temperature of 0 K corresponds to zero energy, and room temperature, 300 K = 27 degree, corresponds to an energy of 0.025 eV.
Industry:Astronomy
The lowest possible temperature, attained when a system is at its minimum possible energy. The Kelvin temperature scale sets its zero point at absolute zero (-273.15 degree on the Celsius scale, and -434.07 degree on the Fahrenheit scale.)
Industry:Astronomy
Un sistema de tres lentes que, juntos, y correcto para aberración esférica, aberración cromática y coma.
Industry:Astronomy
También capa de AR. Una capa de material más bajo del índice de refracción de sólo el espesor adecuado (1/4 onda) se deposita en la superficie a revestir óptica. Recubrimientos más complejas son posibles que cubren una gama grande de longitud de onda.
Industry:Astronomy
elemento metaloide con tres formas. La forma metálica es el más estable y es brillante, plateado, duro y quebradizo
Industry:Astronomy
La dirección en el cielo de que el sol parece estar moviéndose (a una velocidad de 19.4 km s-1) concerniente a estrellas de campo general en la galaxia.
Industry:Astronomy
