milliarcsecond
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milliarcsecond — (mas) a unit of angular measure commonly used in astronomy. One milliarcsecond is equal to 0.001 arcsecond, 0.277 77 microdegrees, or 4.848 137 nanoradians … Dictionary of units of measurement
Minute 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… … Wikipedia
Beta Pictoris — Starbox begin name=Beta PictorisStarbox image caption=Map of the Pictor constellation showing the position of Beta Pictoris.Starbox observe epoch=J2000 ra=05h 47m 17.1scite web|url=http://simbad.u strasbg.fr/simbad/sim id?protocol=html… … Wikipedia
mas — symbol for milliarcsecond, a unit of angular measure commonly used in astronomy. see milliarcsecond … Dictionary of units of measurement
Astrometry — is the branch of astronomy that relates to precise measurements and explanations of the positions and movements of stars and other celestial bodies. Although once thought of as an esoteric field with little useful application for the… … Wikipedia
SI prefix — SI prefixes in everyday use Text Symbol Factor tera T 1000000000000 giga G 1000000 … Wikipedia
Radio astronomy — is a subfield of astronomy that studies celestial objects at radio frequencies. The field originated from the discovery that many astronomical objects emit radiation in the radio wavelengths as well as optical ones. The great advances in radio… … Wikipedia
Upsilon Andromedae — Starbox begin name = Upsilon Andromedae Starbox observe epoch = J2000.0 constell = Andromeda ra = 01h 36m 47.8s dec = +41° 24 20 appmag v =4.09 Starbox character class = F8V r i = 0.30 v r = 0.30 b v = 0.54 u b = 0.06 variable = Starbox… … Wikipedia
Ronald N. Bracewell — Infobox Scientist name = Ronald N. Bracewell box width = image width = caption = birth date = Birth date|1921|07|22 birth place = Sydney, New South Wales, Australia death date = Death date and age|2007|08|12|1921|07|22 death place = Stanford,… … Wikipedia
Cosmic distance ladder — * Light green boxes: Technique applicable to star forming galaxies. * Light blue boxes: Technique applicable to Population II galaxies. * Light Purple boxes: Geometric distance technique. * Light Red box: The planetary nebula luminosity function… … Wikipedia
