| By contrast, some of the well-known bright stars outlining the constellations have parallaxes as small as the limiting value of 0.001″ and are therefore well beyond several hundred light-years distance from the Sun. |
| Read Eco's novel, which is full of Paris meridians, lunar parallaxes, the moons of Jupiter, and the Powder of Sympathy. |
| He also gives the tables of the longitudinal and latitudinal parallaxes for certain geographical latitudes, tables of eclipses, and tables of the visibility of the moon. |
| To determine the parallaxes, he perfected the use of the heliometer, a telescope that uses a split image to measure the angular separation of celestial bodies. |
| It was designed to produce extremely accurate astrometric measurements in small fields, and has been used to measure parallaxes and therefore distance for faint stars. |
| Together with nearby parallax stars, moving-group parallaxes provide the basis for the galactic distance scale. |
