the measurement of a stellar image
101Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
102Omega Centauri — The globular cluster Omega Centauri. Credit ESO Observation data (J2000 epoch) Class Globular cluster …
103Solar wind — For other uses, see Solar wind (disambiguation). The solar wind is a stream of charged particles ejected from the upper atmosphere of the Sun. It mostly consists of electrons and protons with energies usually between 1.5 and 10 keV. The stream of …
104Chirality (chemistry) — L form redirects here. For the bacterial strains, see L form bacteria. Two enantiomers of a generic amino acid …
105Wind — For other uses, see Wind (disambiguation). Wind, from the …
106Minute of arc — This article is about geometry. For firearms terminology, see Minute of Angle. A minute of arc, arcminute, or minute of angle (MOA), is a unit of angular measurement equal to one sixtieth (1⁄60) of one degree. In turn, a second of arc or… …
107Luminosity — has different meanings in several different fields of science.In photometry and color imagingIn photometry, luminosity is sometimes incorrectly used to refer to luminance, which is the density of luminous intensity in a given direction. The SI… …
108Queen's Medal — Die Royal Medal, auch The Queen s Medal genannt, ist eine von der Royal Society verliehene Auszeichnung für Wissenschaftler, die innerhalb des Commonwealth of Nations besonders wichtige Beiträge zur Weiterentwicklung der Wissenschaften geleistet… …
109Royal Medal — Die Royal Medal, auch The Queen s Medal genannt, ist eine von der Royal Society verliehene Auszeichnung für Wissenschaftler, die innerhalb des Commonwealth of Nations besonders wichtige Beiträge zur Weiterentwicklung der Wissenschaften geleistet… …
110asteroid — asteroidal, adj. /as teuh royd /, n. 1. Also called minor planet. Astron. any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in diameter that revolve about the sun in orbits lying mostly between those… …
