... Here, $\lambda = {-180^{\circ}} \ldots {+180^{\circ}}$ is the longitude and $\varphi = {-90^{\circ}} \ldots {+90^{\circ}}$ the latitude in the original coordinate system. ... begin{equation*} \tan(l_{0} - l) = \frac{\cos(\delta) \sin(\alpha - \alpha_{0})}{\sin(\delta) \cos(\delta_{0}) - \cos(\delta) \sin(\delta_{0}) \cos(\alpha - \alpha_{0})} \end{equation*} . ... begin{equation*} \sin(b) = \sin(\delta) \sin(\delta_{0}) + \cos(\delta) \cos(\delta_{0}) \cos(\alpha - \alpha_{0}) \end{equation*} . ...

... Credit Copyright: 1-Meter Schmidt Telescope , ESO Explanation: The closest star system to the Sun is the Alpha Centauri system . Of the three stars in the system, the dimmest -- called Proxima Centauri -- is actually the nearest star . The bright stars Alpha Centauri A and B form a close binary as they are separated by only 23 times the Earth- Sun distance - slightly greater than the distance between Uranus and the Sun. ... NASA Official: Jay Norris. ... Proxima Centauri: The Closest Star . ...

... This distance is equivalent to 3.26 light years. ... The Universe was now a large place and the intrinsic energy output of the stars had to be huge in order that their light could reach us. ... Newton implicitly assumes space is flat . ... An Orbit in Curved Space This is a prediction made by General Relativity and confirmed by direct observation of Mercury. The Ant Universe in Flat Space . ... Hubble noticed a correlation between recessional velocity and distance. ...

... Section M-7 describes the basic problem of trigonometry (drawing on the left): finding the distance to some far-away point C, given the directions at which C appears from the two ends of a measured baseline AB. ... That means that the angle ? ... 2? r covers an angle 360њ . ... Suppose you want to estimate the distance to some distant landmark--e.g. a building, tree or water tower. ... Alpha Centauri, the sun-like star nearest to our solar system, has a distance of 4.3 years and a parallax of 0.75"....

. Next: Области Azimuth и ZenDist. Up: Панель основных параметров телескопа. Previous: Панель основных параметров телескопа. Область Alpha и Delta содержат: . Current -- текущие (откорректированные) координаты объекта; . Sourсe -- исходные координаты объекта; . Cоrr. -- поправки коррекции; . Prepar. -- подготовленные координаты либо оператором, либо переданные астрономом из программы telescope . Shergin V. 2000-01-30

. Next: Области Azimuth и ZenDist Up: Панель основных параметров телескопа Previous: Панель основных параметров телескопа . Область Alpha и Delta содержат: . Current -- текущие (откорректированные) координаты объекта; . Sourсe -- исходные координаты объекта; . Cоrr. -- поправки коррекции; . Prepar. -- подготовленные координаты либо оператором, либо переданные астрономом из программы telescope .

... The greater the distance, the smaller the parallax. ... That triangle has the same proportions as the much larger triangle ABC, and therefore, if the distance B'C to the thumb is 10 times the distance A'B' between the eyes, the distance AC to the far landmark is also 10 times the distance AB. ... The most distant objects our eyes can see are the stars, and they are very far indeed: light which moves at 300,000 kilometers (186,000 miles) per second, would take years, often many years, to reach them. ...

... Delta): projection d'un arc apparent entre le satellite et le corps de rИfИrence sur le parallХle cИleste et le mИridien cИleste qui passent Ю travers le corps de rИfИrence, dites coordonnИes diffИrentielles. ... Les valeurs angulaires sont indiqu es en degr s. Pour certains satellites, les l ments de l'orbite k pl rienne ne sont pas calcul s. Temps de la lumi re est egale zero. ... Les valeurs angulaires sont indiqu es en degr s. Plan- quat.lat.Terre.,lat.long.synodic du sat. ... Plan., ...

... May 26, 1996 . Alpha Centauri: The Closest Star System . ... Explanation: The closest star system to the Sun is the Alpha Centauri system . ... The bright stars Alpha Centauri A and B form a close binary as they are separated by only 23 times the Earth - Sun distance - slightly greater than the distance between Uranus and the Sun . ... Alpha Centauri A, also known as Rigil Kentaurus , is the brightest star in the constellation of Centaurus and is the fourth brightest star in the night sky. ...

... A Snapshot Survey of The Most Massive Clusters of Galaxies . Abstract . ... Distances to Eclipsing M Dwarf Binaries . ... Asteroseismology of Extrasolar Planet Host Stars . ... Globular clusters are the oldest structures within the Milky Way that are directly accessible to observation. ... The present program aims to use the Fine Guidance Sensors on HST to measure the pulsational modes in the star HD 17156, an 8th magnitude G-type subgiant at a distance of ~ 78 parsecs from the Sun. ...