the measurement of a stellar image
61relativity — /rel euh tiv i tee/, n. 1. the state or fact of being relative. 2. Physics. a theory, formulated essentially by Albert Einstein, that all motion must be defined relative to a frame of reference and that space and time are relative, rather than… …
62Cosmic Background Explorer — (COBE) General information NSSDC ID 1989 089A Organization NASA …
63Hipparcos — Infobox Space telescope name = Hipparcos caption = Artist s conception of Hipparcos in space organization = European Space Agency major contractors = alt names = nssdc id = location = orbit type = Geostationary transfer orbit height = 507 to… …
64Johannes Kepler — Infobox Scientist name = Johannes Kepler |175px image width = 175px caption = A 1610 portrait of Johannes Kepler by an unknown artist birth date = Birth date|1571|12|27 birth place = Weil der Stadt near Stuttgart, Germany residence = Baden… …
65HD 189733 b — Planetbox begin name = HD 189733 b Planetbox image caption = An artist s impression of HD 189733 b about to block out its parent star.Planetbox star star = HD 189733 A constell = Vulpecula RA = RA|20|00|43.7133 DEC = DEC|+22|42|39.070 dist ly =… …
66Graphene — is a one atom thick planar sheet of sp2 bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It can be viewed as an atomic scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + ENE;… …
67Proper motion — The proper motion of a star is its angular change in position over time as seen from the center of mass of the solar system.[1] It is measured in seconds of arc per year, arcsec/yr, where 3600 arcseconds equal one degree.[2] This contrasts with… …
68Metallicity — The globular cluster M80. Stars in globular clusters are mainly older metal poor members of Population II. In astronomy and physical cosmology, the metallicity (also called Z[1]) of an object is the proportion of its matter made …
69Galaxy formation and evolution — The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have… …
70Copley Medal — The Copley Medal awarded to Mendeleev in 1905 …
