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  1. SI History Chronology

    MMT Used to Make Historic Measurement

    • Date: February, 1984

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  3. SI History Chronology

    SAO Loses Satellite-tracking Contract

    • Date: 1983

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  5. SI History Chronology

    C. G. Abbot Named Assistant Secretary

    • Date: December 16, 1918

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  7. SI History Chronology

    SAO Satellite Experiment Launched

    • Date: March 9, 1994

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  9. SI History Chronology

    X-ray Satellite Launched with SAO Payload

    • Date: August 12, 1977

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  11. SI History Chronology

    Center for Astrophysics Formed

    • Date: July 1, 1973

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  13. SI History Chronology

    New Telescope's Dedication Ceremony on Mt. Hopkins

    • Date: September 29, 1970

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  15. SI History Chronology

    Time Capsule Placed in MMT Foundation

    • Date: March 6, 1976

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  17. SI History Bibliography

    The Astrophysical Observatory

    • Date: 1897
    • Creator: Langley, S. P (Samuel Pierpont) 1834-1906
    • Creator: Langley, S. P (Samuel Pierpont) 1834-1906

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  19. SI History Bibliography

    Sketch of Professor S. P. Langley

    • Date: 1885
    • Creator: Holden, Edward Singleton
    • Creator: Holden, Edward Singleton

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  21. SI History Chronology

    Astronomy Telegraph System Transferred

    • Date: January 10, 1883

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  23. Collection

    Program Files, 1967-1972

    • Date: 1967 1967-1972
    • Creator: Smithsonian Astrophysical Observatory Southwest Meteor Spectral Patrol

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Showing results 37 - 48 of 383 for Twitter

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