Results 21 to 30 of about 883,811 (388)

Review of the development of the hydrogen maser technique and a brief introduction to its space applications

open access: yesFrontiers in Physics, 2022
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]

open access: yesSHS Web of Conferences, 2023
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]

open access: yesنگره, 2022
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
doaj   +1 more source

Cosmological Ideas of Johannes Kepler in Their Relation to Antiquity Based on the Treatise Harmonices Mundi [PDF]

open access: yesФилософия и космология, 2023
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
doaj   +1 more source

Primordial black holes—perspectives in gravitational wave astronomy [PDF]

open access: yes, 2018
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]

open access: yesPublications Astronomical Society of Australia, 2018
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

open access: yesInterfaces: A Journal of Medieval European Literatures, 2021
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
doaj   +1 more source

The carbon footprint of large astronomy meetings [PDF]

open access: yesNature Astronomy, 2020
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]

open access: yesScientific Technical Review, 2023
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
doaj   +1 more source

Astrobites as a Community-led Model for Education, Science Communication, and Accessibility in Astrophysics [PDF]

open access: yes, 2019
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

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