Exemplos de uso de Apparent brightness em Inglês e suas traduções para o Português
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Star Eta Carinae apparent brightness as a supernova impostor in April 1843.
As a star moves toward or away from us, its apparent brightness changes.
The star has an apparent brightness of 3.72, the third-brightest of the stars in the group.
Also, accurate photometry is usually more difficult when the apparent brightness of the object is fainter.
The typical range in apparent brightness for Venus over the course of one apparition is less than a factor of 10 or merely 1% that of Mercury.
This difference of more than 7 magnitudes corresponds to a change of over a thousand times in apparent brightness.
Luminosity is not the same as the apparent brightness of the stars as we see them in the sky.
If the jet is oriented along the line of sight to Earth,relativistic beaming will change its apparent brightness.
Relative photometry is the measurement of the apparent brightness of multiple objects relative to each other.
The apparent brightness of Mercury as seen from Earth is greatest at phase angle 0°(superior conjunction with the Sun) when it can reach magnitude -2.6.
He also measured their relative distances by measuring the apparent brightness of a class of variable stars called Cepheids in each galaxy.
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82,as well as several other galaxies with high apparent brightnesses.
In contrast to Mercury the maximal apparent brightness of Venus as seen from Earth does not occur at phase angle zero.
Because the K-type star has been pulled into an ellipsoidal shape,the amount of surface area visible, and thus the apparent brightness changes from the Earth's perspective.
In astronomy, surface brightness quantifies the apparent brightness or flux density per unit angular area of a spatially extended object such as a galaxy or nebula, or of the night sky background.
Because the stars in an open cluster are all at roughly the same distance from Earth, and were born at roughly the same time from the same raw material,the differences in apparent brightness among cluster members is due only to their mass.
Its effective temperaturehas been measured at 3,540 K, which together with the apparent brightness of the star indicates a luminosity of 0.15 times the solar luminosity and a radius of 1.05 times the solar radius.
Magnitude===The apparent brightness of a star is expressed in terms of its apparent magnitude, which is the brightness of a star and is a function of the star's luminosity, distance from Earth, and the altering of the star's light as it passes through Earth's atmosphere.
Twinkling, or scintillation, is a generic term for variations in apparent brightness or position of a distant luminous object viewed through a medium.
Astronomers use flux to denote the apparent brightness of a celestial body. The apparent brightness is defined as the amount of light received from a star above the earth atmosphere passing through a unit area each second. Therefore, the apparent brightness is simply the flux we receive from a star.
History==The magnitude system dates back roughly 2000 years to the Greek astronomer Hipparchus(or the Alexandrian astronomer Ptolemy-references vary)who classified stars by their apparent brightness, which they saw as size"magnitude" means"bigness, size.
Absolute photometry is the measurement of the apparent brightness of an object on a standard photometric system; these measurements can be compared with other absolute photometric measurements obtained with different telescopes or instruments.
Magnitude The degree of brightness of a celestial body designated on a numerical scale, on which the brightest star has magnitude -1.4 and the faintest visible star has magnitude 6,with the scale rule such that a decrease of one unit represents an increase in apparent brightness by a factor of 2.512; also called apparent magnitude.
The glare from the front sight can increase the apparent brightness of the light bar on one side of the sight, causing windage errors in aiming, or lower the apparent height of the front sight, causing elevation errors in aiming.
Following advances in understanding the diffraction of light and astronomical seeing, astronomers fully understood both that the apparent sizes of stars were spurious and how those sizes depended on the intensity of light coming from a star(this is the star's apparent brightness, which can be measured in units such as watts/cm2) so that brighter stars appeared larger.
Different types of laser pointer can show different colors of light, and the apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye.
Different types of laser pointer can show different colors of light, and the apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye.
List of Applications for Laser Pointers:Different types of laser pointer can show different colors of light, and the apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye.
List of Applications for Laser Pointers:Different types of laser pointer can show different colors of light, and the apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye.
List of Applications for Laser Pointers:Different types of laser pointer can show different colors of light, and the apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye.