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Open Maps - allows the user to choose in addition to, and as replacements for, the standard mapping styles from Google Maps, one of two extra mapping styles provided by the open source mapping community: OpenStreetMap, or Open Cycle Map Normal. [4] Day/Night - shows day/night shading and sunrise/sunset terminator superimposed on the mapping ...
Stellar parallax is most often measured using annual parallax, defined as the difference in position of a star as seen from Earth and Sun, i.e. the angle subtended at a star by the mean radius of Earth's orbit around the Sun. The parsec (3.26 light-years) is defined as the distance for which the annual parallax is 1 arcsecond. Annual parallax ...
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or half-angle of inclination between those two lines. [1] [2] Due to foreshortening, nearby objects show a larger parallax than farther objects, so parallax can be used to determine distances.
A parsec is the distance from the Sun to an astronomical object that has a parallax angle of one arcsecond (not to scale). The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (AU), i.e. 30.9 trillion kilometres (19.2 trillion miles).
In astronomy, the distance to a visual binary star may be estimated from the masses of its two components, the angular size of their orbit, and the period of their orbit about one another. [1] A dynamical parallax is an (annual) [ clarification needed ] parallax which is computed from such an estimated distance.
Full-sky Astrometric Mapping Explorer (or FAME) Full-sky Astrometric Mapping Explorer (or FAME) was a NASA proposed astrometric satellite designed to determine with unprecedented accuracy the positions, distances, and motions of 40 million stars within our galactic neighborhood (distances by stellar parallax possible).