The measurement of a stellar image

См. также в других словарях:

• Stellar rotation — is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface.The rotation of a star produces an equatorial bulge due to… …   Wikipedia

• Stellar classification — In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are… …   Wikipedia

• History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… …   Wikipedia

• List of the most distant astronomical objects — This article documents the farthest known astronomical objects, and the time periods in which they were so classified. Contents 1 List of most distant objects by type 2 Most distant astronomical object recordholders 3 List of most distant objects …   Wikipedia

• Formation and evolution of the Solar System — Artist s conception of a protoplanetary disk The formation and evolution of the Solar System is estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud …   Wikipedia

• Clock of the Long Now — The first prototype, on display at the Science Museum in London. The Clock of the Long Now, also called the 10,000 year clock, is a proposed mechanical clock designed to keep time for 10,000 years. The project to build it is part of the Long Now… …   Wikipedia

• Science and mathematics from the Renaissance to Descartes — George Molland Early in the nineteenth century John Playfair wrote for the Encyclopaedia Britannica a long article entitled ‘Dissertation; exhibiting a General View of the Progress of Mathematics and Physical Science, since the Revival of Letters …   History of philosophy

• Magnetospheric Multiscale Mission — The Magnetospheric Multiscale Mission (MMS) is a NASA unmanned space mission, to study the Earth s magnetosphere using four identical spacecraft flying in a tetrahedral formation. It is designed to gather information about the microphysics of… …   Wikipedia

• Weber–Fechner law — The Weber–Fechner law attempts to describe the relationship between the physical magnitudes of stimuli and the perceived intensity of the stimuli. Ernst Heinrich Weber (1795–1878) was one of the first people to approach the study of the human… …   Wikipedia

• Star — For other uses, see Star (disambiguation) …   Wikipedia

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium