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  1. Die Kalender

    Die Bewegungsmuster von Sonne, Mond und den Sternen bildeten die Grundlage für antike Kalender. Da diese Himmelskörper unterschiedliche Zyklen...
    Chapter 2023
  2. Antike Modelle des Universums

    Das Universum umfasst die Erde und die Himmelskörper. Welche Formen und Strukturen haben Himmel und Erde? Nach unserer alltäglichen Erfahrung...
    Chapter 2023
  3. Größe der Erde

    Mit einem einfachen Instrument und geometrischen Argumenten konnte der griechische Astronom Eratosthenes die Größe der Erde recht genau bestimmen....
    Chapter 2023
  4. An Interlude: Special & General Relativity

    If there is one scientist that nearly everyone can name, it is Albert Einstein. Similarly, the one scientific theory that everyone has heard of, is...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  5. The Speculative Universe

    The final chapter deals with topics that are, at present, still highly hypothetical. As well as controversial. There is not enough observational or...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  6. The Sun, Our Nearest Star

    In this chapter, we shall look at the Sun, bearing in mind it is a star on the main sequence. With this approach, it is possible to use the Sun as a...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  7. Star Death: White Dwarfs and Planetary Nebulae

    Stars live for millions, billions and even hundreds of billions of years, and so you may be thinking how on Earth can we know anything about how a...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  8. Active Galaxies

    We now discuss a type of galaxy that has become very prominent in astrophysical research over the past 20 or so years—active galaxies and active...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  9. The Hertzsprung-Russell Diagram

    We have already covered many topics in our description of a star’s basic characteristics, such as its mass, radius, spectral type and temperature. We...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  10. Tools of the Trade

    Let us begin our journey with several simple, but also very important, basic concepts that are used throughout all of astronomy, whether amateur of...
    Michael Inglis in Astrophysics Is Easy!
    Chapter 2023
  11. Die Copernicus-Revolution

    Zu Beginn des 16. Jahrhunderts waren die Gelehrten in Europa zu einer gemeinsamen Auffassung über die Struktur des Universums gelangt. Das Universum...
    Chapter 2023
  12. Das Vermächtnis von Copernicus

    Wie sind die Leistungen von Copernicus im Vergleich zu denen von Ptolemäus zu bewerten? Wenn wir ihre Fähigkeiten zur Erklärung und Vorhersage...
    Chapter 2023
  13. Epilog

    Wir glauben heute, dass unser Universum aus physikalischen Objekten besteht, die physikalischen Gesetzen gehorchen. Wo liegen die Grenzen der...
    Chapter 2023
  14. Auswirkungen der Himmelsbewegungen auf menschliche Aktivitäten

    Das Leben der Menschen in der Antike wurde von der Sonne bestimmt. Licht und Wärme, die von der Sonne ausgehen, waren für das Überleben unerlässlich....
    Chapter 2023
  15. Dreht sich die Erde wirklich um die Sonne?

    Ptolemäus’ Modell legte Wert auf präzise Vorhersagen der Planetenbewegungen und benötigte zur Erreichung dieses Ziels die Äquanten, Exzenter und...
    Chapter 2023
  16. A Brief Overview of Deep-Sky Imaging Equipment

    The process of imaging a deep-sky object is in theory very simple. It involves a telescope or a basic camera and lens that tracks the movement of the...
    Michael O’Brien in A Deep Sky Astrophotography Primer
    Chapter 2023
  17. Light Pollution and the Night Sky

    Our ancestors used the cycle of constellations as a seasonal guide, hel** them decide when it was time for activities such as planting, harvesting...
    Michael O’Brien in A Deep Sky Astrophotography Primer
    Chapter 2023
  18. Computer Control of a Telescope

    Using a computer to control an amateur telescope adds functionality that wasn’t possible previously and turns a hobby telescope into one capable of...
    Michael O’Brien in A Deep Sky Astrophotography Primer
    Chapter 2023
  19. Technology, Society and Economy

    Although space science was the most visible part of the space programme, the 1970s saw it transformed into a wide-spectrum programme to benefit...
    Brian Harvey in Japan In Space
    Chapter 2023
  20. Change of Direction

    There was a significant change in direction in Japan’s space programme in 1998, the key moment being the firing of the Taepo Dong missile by the...
    Brian Harvey in Japan In Space
    Chapter 2023
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