American Journal of Astronomy and Astrophysics

Volume 8, Issue 4, December 2020

  • The Cape York Meteorites, the Younger Dryas, and Their Possible Association with the Hiawatha and Paterson Impact Craters

    Martin Beech, Mark Comte, Ian Coulson

    Issue: Volume 8, Issue 4, December 2020
    Pages: 66-74
    Received: Oct. 20, 2020
    Accepted: Nov. 02, 2020
    Published: Nov. 09, 2020
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    Abstract: The recent discovery of the Hiawatha and Paterson impact craters in north-western Greenland has motivated three intriguing questions: are they associated with the Cape York meteorites, did they form at the same time, and can one or both of the craters be associated with the abrupt cooling of the Earth, some 10 - 13,000 years ago, at the onset of th... Show More
  • The Development of Multi-planetary Weight Measurement System for Computational Astronomy

    Justus Chukwunonyerem, Ezechi Nwachukwu Emmanuel, Daniyan Omoniyi Lanre, Onubi Peter Offor, Donatus Nwagbara, Ayogu Harrison Ejiofor, Bonaventure Okere, Aliyu Nasiru, Chigozi Bethel Wali, Nnadi Joseph Odo, Chinedu Emeka Omulu, Ogochukwu Edith Eze, Kevin Eze Chukwunyere, Ayogu Jideofor Uchenna, Macdenis Onyekachi Egbuhuzor

    Issue: Volume 8, Issue 4, December 2020
    Pages: 75-79
    Received: Oct. 27, 2020
    Accepted: Nov. 07, 2020
    Published: Nov. 16, 2020
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    Abstract: In this work, the design of a multi-planetary weight measurement device comprising of a hardware and software system, capable of measuring and displaying the weight of objects in different planets of our solar system is presented. It is a microcontroller-based device indigenously designed for computational astronomy needs in multi-planetary weight ... Show More
  • The Cause of Tension in the Measurements of the Hubble Constant

    Naser Mostaghel

    Issue: Volume 8, Issue 4, December 2020
    Pages: 80-86
    Received: Oct. 16, 2020
    Accepted: Nov. 06, 2020
    Published: Dec. 08, 2020
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    Abstract: The latest reported measurements for the evaluation of the Hubble constant by two different teams, the Riess et al. (2019) in USA and the Plank Collaboration (2018) in Europe, in spite of increased accuracy of measurements, have resulted in significantly different values. This tension between the results of the two different measurement methodologi... Show More