FACTOID # 21: 15% of Army recruits from South Dakota are Native American, which is roughly the same percentage for female Army recruits in the state.
 
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Encyclopedia > Gaia probe

Gaia is an astrometry space mission, and a successor to the ESA Hipparcos mission. It was included within the context of the ESA Horizon 2000 Plus long-term scientific programme in 2000. It is expected to be launched by the ESA in the second half of 2011, and will be operated in a Lissajous-type orbit around at the second Lagrangian point (L2) of the Sun-Earth-Moon system. This article does not cite its references or sources. ... The European Space Agency (ESA), established in 1975, is an inter-governmental organisation dedicated to the exploration of space, currently with 17 member states. ... Hipparcos (for High Precision Parallax Collecting Satellite) was an astrometry mission of the European Space Agency (ESA) dedicated to the measurement of stellar parallax and the proper motions of stars. ... The European Space Agency (ESA), established in 1975, is an inter-governmental organisation dedicated to the exploration of space, currently with 17 member states. ... 2011 (MMXI) will be a common year starting on Saturday of the Gregorian calendar. ... Lissajous figure on an Oscilloscope Lissajous figure in three dimensions In mathematics, a Lissajous curve (Lissajous figure or Bowditch curve) is the graph of the system of parametric equations which describes complex harmonic motion. ... A contour plot of the effective potential of a two-body system (the Sun and Earth here), showing the 5 Lagrange points. ... This is a list of known objects which have been, are or are planned to occupy any of the five Lagrangian points of two-body systems in space. ... The Sun is the star at the center of our solar system. ... Earth (often referred to as The Earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth in order of size. ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ...


Gaia will compile a catalogue of approximately one thousand million stars to magnitude 20. Its objectives comprise (a) astrometric (or positional) measurements, determining the positions, distances, and annual proper motions of stars with an accuracy of about 20 µas (microarcsecond) at 15 mag, and 200 µas at 20 mag; (b) photometric measurements, providing multi-colour multi-epoch observations of each detected object; and (c) radial velocity measurements. Gaia will create an extremely precise three-dimensional map of stars throughout our Milky Way galaxy and beyond, and map their motions which encode the origin and subsequent evolution of the Milky Way. The photometric measurements will provide the detailed physical properties of each star observed, characterising their luminosity, temperature, gravity, and elemental composition. This massive stellar census will provide the basic observational data to tackle a wide range of important problems related to the origin, structure, and evolutionary history of our Galaxy. Large numbers of quasars, galaxies, extrasolar planets, and solar system bodies will be measured at the same time. The Pleiades star cluster A star is a massive, compact body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... It has been suggested that milliarcsecond be merged into this article or section. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... Note: This article contains special characters. ... Luminosity has different meanings in several different fields of science. ... In physics, gravitation or gravity is the tendency of objects with mass to accelerate toward each other. ... A chemical element, often called simply element, is a chemical substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical methods. ... This view, taken with infrared light, is a false-color image of a quasar-starburst tandem with the most luminous starburst ever seen in such a combination. ... NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light years in diameter and approximately 60 million light years distant. ... Infrared image of the star GQ Lupi (A) orbited by a brown dwarf or planet (b). ... Major features of the solar system (not to scale) The solar system comprises the Sun and the retinue of celestial objects gravitationally bound to it: nine planets and their 158 currently known moons, as well as asteroids, meteoroids, planetoids, comets, and interplanetary dust. ...


External links

  • ESA Gaia mission

  Results from FactBites:
 
Gaia probe - Wikipedia, the free encyclopedia (279 words)
Gaia is an astrometry space mission, and a successor to the ESA Hipparcos mission.
Its objectives comprise (a) astrometric (or positional) measurements, determining the positions, distances, and annual proper motions of stars with an accuracy of about 20 µas (microarcsecond) at 15 mag, and 200 µas at 20 mag; (b) photometric measurements, providing multi-colour multi-epoch observations of each detected object; and (c) radial velocity measurements.
Gaia will create an extremely precise three-dimensional map of stars throughout our Milky Way galaxy and beyond, and map their motions which encode the origin and subsequent evolution of the Milky Way.
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