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  •  By the way 23 years of Hubble today (14+ / 0-)

    M51: The Whirlpool Galaxy in Dust and Stars photo m51dust_hubble_960.jpg

    Hubble Essentials: Quick Facts

    Hubble's Name
    NASA named the world's first space-based optical telescope after American astronomer Edwin P. Hubble (1889—1953). Dr. Hubble confirmed an "expanding" universe, which provided the foundation for the Big Bang theory.

    Launch: April 24, 1990 from space shuttle Discovery (STS-31)
    Deployment: April 25, 1990
    Mission Duration: Up to 20 years
    Servicing Mission 1: December 1993
    Servicing Mission 2: February 1997
    Servicing Mission 3A: December 1999
    Servicing Mission 3B: February 2002
    Servicing Mission 4: May 2009

    Length: 43.5 ft (13.2 m)
    Weight: 24,500 lb (11,110 kg)
    Maximum Diameter: 14 ft (4.2 m)

    Cost at Launch   
    $1.5 billion

    Spaceflight Statistics   
    Orbit: At an altitude of 307 nautical miles (569 km, or 353 miles), inclined 28.5 degrees to the equator (low-Earth orbit)
    Time to Complete One Orbit: 97 minutes
    Speed: 17,500 mph (28,000 kph)

    Optical Capabilities   
    Hubble Can't Observe: The Sun or Mercury, which is too close to the Sun
    Sensitivity to Light: Ultraviolet through infrared (115—2500 nanometers)
    First Image: May 20, 1990: Star Cluster NGC 3532

    Data Statistics   
    Hubble transmits about 120 gigabytes of science data every week. That's equal to about 3,600 feet (1,097 meters) of books on a shelf. The rapidly growing collection of pictures and data is stored on magneto-optical disks.

    Power Needs   
    Energy Source: The Sun
    Mechanism: Two 25-foot solar panels
    Power usage: 2,800 watts

    Pointing Accuracy   
    In order to take images of distant, faint objects, Hubble must be extremely steady and accurate. The telescope is able to lock onto a target without deviating more than 7/1000th of an arcsecond, or about the width of a human hair seen at a distance of 1 mile.

    Hubble's Mirrors   
    Primary Mirror Diameter: 94.5 in (2.4 m)
    Primary Mirror Weight: 1,825 lb (828 kg)
    Secondary Mirror Diameter: 12 in (0.3 m)
    Secondary Mirror Weight: 27.4 lb (12.3 kg)

    Power Storage   
    Batteries: 6 nickel-hydrogen (NiH)
    Storage Capacity: equal to 20 car batteries

    Therefore Simplicio, come either with arguments and demonstrations and bring us no more Texts and authorities, for our disputes are about the Sensible World, and not one of Paper.

    by palantir on Wed Apr 24, 2013 at 09:09:14 PM PDT

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