American Journal of Astronomy and Astrophysics

Archive

Volume 7, Issue 1, March 2019

  • The Production of Terrestrial Meteorites – Moon Accretion and Lithopanspermia

    Martin Beech, Mark Comte, Ian Coulson

    Issue: Volume 7, Issue 1, March 2019
    Pages: 1-9
    Received: 9 May 2019
    Accepted: 12 June 2019
    Published: 1 July 2019
    DOI: 10.11648/j.ajaa.20190701.11
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    Abstract: The conditions under which terrestrial, impact-derived ejecta can be launched into cis-lunar space is studied. A numerical code is developed in order to follow the ablation and deceleration conditions of material ejected from the Earth’s surface and outwards through the atmosphere. The deceleration filtering-effect imposed by Earth’s atmosphere res... Show More
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  • Coronal Mass Ejections, Solar Cycles and Magnetic Poles Reversal

    Kim Kwee Ng

    Issue: Volume 7, Issue 1, March 2019
    Pages: 10-17
    Received: 19 June 2019
    Accepted: 12 July 2019
    Published: 26 July 2019
    DOI: 10.11648/j.ajaa.20190701.12
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    Abstract: The magnitude of the measured geomagnetic index increases when the Coronal Mass Ejections occur on the Sun's surface. The abrupt increase in the geomagnetic index has seriously impacted the accuracy in the forecast of the activity of the next solar cycle. A method is proposed to filter the effect from the Coronal Mass Ejections. The correlation bet... Show More
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