Since 1960, when the first hydrogen frequency standard, the microwave amplification by stimulated emission of radiation (maser), was developed in the laboratory of Norman Ramsey at Harvard University, the performance of its frequency stability and ...
Jiayu Dai+5 more
doaj +1 more source
The peculiar fate of human reason. Reflections on Kant’s concept of astronomy [PDF]
The question whether and how Kant can introduce a concept of reason which is compatible with his critical claims of enlightenment is a perennial challenge.
Meer Rudolf
doaj +1 more source
Formal Comparative Study of Cosmos Paintings in Qazvini's "Ajā'ib al-Makhlūqāt wa Gharā'ib al-Mawjūdāt" and "Al-Tafhim li Awa'il Sana'at al-Tanjim" Arabic Version (1280 AD), Persian Version (1500-1599 AD), Arabic Version (1750-1770 AD) [PDF]
The strange wonderful themes and contents of this world have been discussed in different periods. In addition to their authorship by scholars, the writing of these manuscripts has also been considered.
Zahra Masoudi Amin
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Cosmological Ideas of Johannes Kepler in Their Relation to Antiquity Based on the Treatise Harmonices Mundi [PDF]
The article presents the results of the authors’ research on the cosmological views of Johannes Keppler in his Latin treatise Harmonices Mundi. The authors discuss the background of composing the treatise concerning the philosophical, religious, and ...
Sergii Rudenko, Mariia Lastovets
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Primordial black holes—perspectives in gravitational wave astronomy [PDF]
This article reviews current understanding of primordial black holes (PBHs), with particular focus on those massive examples (≳1015 g) which remain at the present epoch, not having evaporated through Hawking radiation. With the detection of gravitational
M. Sasaki+3 more
semanticscholar +1 more source
An introduction to Bayesian inference in gravitational-wave astronomy: Parameter estimation, model selection, and hierarchical models [PDF]
This is an introduction to Bayesian inference with a focus on hierarchical models and hyper-parameters. We write primarily for an audience of Bayesian novices, but we hope to provide useful insights for seasoned veterans as well.
E. Thrane, C. Talbot
semanticscholar +1 more source
Reversals of War: Alcuin and Charlemagne's Retrograde Thoughts on Retrograde Motion
The apparent retrograde motion of the planets was a puzzle for astronomers from the ancient world to the final establishment of heliocentric cosmology in the early modern period, but enjoyed an especially rich discussion in the Carolingian Renaissance ...
Tom McLeish, Mary Garrison
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The carbon footprint of large astronomy meetings [PDF]
The annual meeting of the European Astronomical Society took place in Lyon, France, in 2019, but in 2020 it was held online only due the COVID-19 pandemic.
L. Burtscher+7 more
semanticscholar +1 more source
On life and scientific activity of Ruđer Bošković [PDF]
The paper presents the new insights to origin and family of our great scientist, philosopher, artist and diplomat Ruđer Bošković (1711-1787). His rich career is related to his hometown Dubrovnik, where he was born in 1711.
Ninković Slobodan, Lisov Miodrag
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Astrobites as a Community-led Model for Education, Science Communication, and Accessibility in Astrophysics [PDF]
Support for early career astronomers who are just beginning to explore astronomy research is imperative to increase retention of diverse practitioners in the field.
Bridge, Joanna S.+25 more
core +3 more sources