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Spectroscopy

April 13, 2018

The Permanent Watch of the Sky

March 20, 2018

Supercomputer

October 13, 2018

What is the Universe?

October 29, 2017

The Theoretical Models

May 14, 2018

History of Astronomy Part I

December 5, 2017

Zodiac Signs and Astrology

October 20, 2017

Sky Surveyors

January 16, 2018

Professional Astronomy

February 5, 2018

The Calendar

August 6, 2019
    Astronomy

    Observatories of Big Ear and Nançay

    by Enigma May 2, 2023
    written by Enigma
    May 2, 2023
    6 comments
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  • Radioastronomy

    Radioastronomy

    by Enigma April 17, 2023
    by Enigma April 17, 2023 22 comments

    It has been known since the discovery of Heinrich Hertz in 1887 that radio waves are of the same nature as light waves. In particular they propagate in a vacuum …

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  • Astronomy

    Photography and its Limits

    by Enigma April 4, 2023
    by Enigma April 4, 2023 9 comments

    While the eye is sensitive only to the light perceived instantly, the silver medium (photo plate and films) that was still used until the 1980s can record the light received …

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  • Astronomy

    The Equatorial Mount

    by Enigma March 19, 2023
    by Enigma March 19, 2023 6 comments

    It is enough to have spent a few seconds on the eyepiece of a so-called azimuthal instrument, mounted on a tripod, to be aware of the sidereal movement which causes …

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  • Astrobiology

    Solar Telescope

    by Enigma March 6, 2023
    by Enigma March 6, 2023 30 comments

    Around the world, about thirty observatories have dedicated at least one telescope to the study of the Sun. Given the atmospheric turbulence, it is almost impossible to use instruments over …

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  • Techno

    Technological Challenges

    by Enigma February 26, 2023
    by Enigma February 26, 2023 7 comments

    Since the manufacture of the 5 m diameter mirror of the Mount Palomar Observatory in 1939, because of their gross mass exceeding 40 tons, the mirrors of the large telescopes …

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  • Astrophysics

    Modern Times

    by Enigma February 15, 2023
    by Enigma February 15, 2023 10 comments

    At the turn of the twentieth century, Lorentz understood the futility of mechanical support to explain the propagation of the electromagnetic field. He also discovered the theory of electrons. Meanwhile, …

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