Move Over Hubble, Meet the New High Powered Star Searcher

NASA’S James Webb Space Telescope



Excerpt from space.com



NASA’s James Webb Space
Telescope, scheduled for launch in 2018, will probe the cosmos to
uncover the history of the universe from the Big Bang to alien planet
formation and beyond.



Scientists are planning to use the infrared telescope to search for the
first galaxies that formed at the beginning of the universe. The James Webb Space Telescope
(JWST) will also have the ability to look through cosmic dust clouds to
find newly forming planetary systems and seek out the chemical origins
of life in the solar system.



The powerful
$8.8 billion spacecraft is also expected to take amazing photos of
celestial objects like its predecessor, the Hubble Space Telescope. 


Instruments on board



The JWST will come equipped with four science instruments.


  • Near-Infrared Camera (NIRCam) — Provided by the
    University of Arizona, this infrared camera will detect light from stars
    in nearby galaxies and stars within the Milky Way. It will also search
    for light from stars and galaxies that formed early in the universe’s
    life. NIRCam will be outfitted with coronagraphs that can block a bright
    object’s light, making dimmer objects near those stars (like planets)
    visible.
  • Near-Infrared Spectrograph (NIRSpec) — NIRSpec will
    observe 100 objects simultaneously, searching for the first galaxies
    that formed after the Big Bang. NIRSpec was provided by the European
    Space Agency with help from NASA’s Goddard Space Flight Center.
  • Mid-Infrared Instrument (MIRI) — MIRI will produce amazing space photos
    of distant celestial objects, following in Hubble’s tradition of
    astrophotography. The spectrograph that is a part of the instrument will
    allow scientists to gather more physical details about distant objects
    in the universe. MIRI will detect distant galaxies, faint comets,
    forming stars and objects in the Kuiper Belt. MIRI was built by the
    European Consortium with the European Space Agency and NASA’s Jet
    Propulsion Laboratory.
  • Fine Guidance Sensor/Near InfraRed Imager and Slitless Spectrograph (FGS/NIRISS)
    — This Canadian Space Agency-built instrument is more like two
    instruments in one. The FGS component is responsible for keeping the
    JWST pointed in exactly the right direction during its science
    investigations. NIRISS will scope out the cosmos to find signatures of
    the first light in the universe and seek out and characterize alien
    planets.



The telescope will also sport a tennis court-size sunshield and a 21.3
foot (6.5 meter) mirror — the largest mirror ever launched into space.
Those components will not fit into the rocket launching the JWST, so both will unfurl once the telescope is in space.


Infrared: Inside the huge space observatory that operates from a point in space four times further away than the moon.

James Webb the man



The JWST is named for former NASA chief James Webb. Webb took charge of the space agency from 1961 to 1968, retiring just a few months before NASA put the first man on the moon.

Source Article from http://feedproxy.google.com/~r/AscensionEarth2012/~3/qScOAisa6bc/move-over-hubble-meet-new-high-powered.html

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