Arthur Neville Brown: schoolmaster and variable star observerArthur Neville Brown, MA, FRAS (1864-1934) was a prolific variable star observer and served for many years as Secretary of the BAA Variable Star Section. This paper discusses Brown's life and…Jeremy Shears·Sep 18, 2012SaveLearn
The astronomizings of Dr. Anderson and the curious case of his disappearing novaDr. Thomas David Anderson (1853-1932) was a Scottish amateur astronomer famed for his discovery of two bright novae: Nova Aurigae 1891 and Nova Persei 1901. He also discovered more than 50 variable…Jeremy Shears·Sep 18, 2012SaveLearn
F.W. Longbottom: astronomical photographer and founder of the Chester Astronomical SocietyFrederick William Longbottom FRAS (1850-1933) was an original member of the British Astronomical Association and served as Director of its Photographic Section between 1906 and 1926. A hop merchant…Jeremy Shears·Sep 18, 2012SaveLearn
The History of AstrometryThe history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical…Michael Perryman·Sep 17, 2012SaveLearn
Lattice Gauge Theory and the Origin of MassMost of the mass of everyday objects resides in atomic nuclei; the total of the electrons' mass adds up to less than one part in a thousand. The nuclei are composed of nucleons---protons and…Andreas S. Kronfeld·Sep 16, 2012SaveLearn
Measurement Theory in the Philosophy of ScienceThe philosophy of science is a discipline concerning the metaphysical aspect of science. Recently, I proposed measurement theory, which is characterized as the metaphysical and linguistic…Shiro Ishikawa·Sep 16, 2012SaveLearn
Da Gauss a EinsteinThe present short essay, of essentially historical nature, aims at describing the transition from the Euclidean-Newtonian space-time geometry of Classical Physics to the Pseudoriemannian geometry of…C. Lo Surdo·Sep 12, 2012SaveLearn
Ad Orientem: the Orientation of Gothic Cathedrals of FranceHere the orientation of the Gothic cathedrals in France is discussed and investigated using the satellite maps. Except a few of them, these buildings have the apse facing the rising sun, according to…Amelia Carolina Sparavigna·Sep 11, 2012SaveLearn
The different paths to entropyIn order to undestand how the complex concept of entropy emerged,we propose a trip towards the past reviewing the works of Clausius, Boltzmann, Gibbs and Planck. In particular, since the Gibbs's…L. Benguigui·Sep 11, 2012SaveLearn
Light and Shadows over Petra: astronomy and landscape in Nabataean landsThe Nabateans built several monuments in Petra and elsewhere displaying a decoration with a preference for astronomical motifs, possibly as a reflection of their religion. However, due to the lack of…J. A. Belmonte, A. C. Gonzalez-Garcia, A. Polcaro·Sep 7, 2012SaveLearn
Is There a Unique Physical Entropy? Micro versus MacroEntropy in thermodynamics is an extensive quantity, whereas standard methods in statistical mechanics give rise to a non-extensive expression for the entropy. This discrepancy is often seen as a sign…Dennis Dieks·Sep 5, 2012SaveLearn
Orientations of linear stone arrangements in New South WalesWe test the hypothesis that Aboriginal linear stone arrangements in New South Wales (NSW) are oriented to cardinal directions. We accomplish this by measuring the azimuths of stone arrangements…Duane W. Hamacher, Robert S. Fuller, Ray P. Norris·Sep 2, 2012SaveLearn
Atmospheric ionization and cosmic rays: studies and measurements before 1912The discovery of cosmic rays, a milestone in science, was based on the work by scientists in Europe and the New World and took place during a period characterised by nationalism and lack of…Alessandro De Angelis·Aug 31, 2012SaveLearn
A Theory of the Knowledge IndustryThis paper deals with the social production of knowledge in the exact sciences. After defining the term, exact science, it delineates the broad dynamic of its history. It, then, offers a…Hisham Ghassib·Aug 28, 2012SaveLearn
Experimental Reconstruction of Lomonosov's Discovery of Venus's Atmosphere with Antique Refractors During the 2012 Transit of VenusIn 1761, the Russian polymath Mikhail Vasilievich Lomonosov (1711-1765) discovered the atmosphere of Venus during its transit over the Sun's disc. In this paper we report on experimental…Alexandre Koukarine, Igor Nesterenko, Yuri Petrunin et al.·Aug 27, 2012SaveLearn
Early Atomic Models - From Mechanical to Quantum (1904-1913)A complete history of early atomic models would fill volumes, but a reasonably coherent tale of the path from mechanical atoms to the quantum can be told by focusing on the relevant work of three…Charles Baily·Aug 26, 2012SaveLearn
Popper, Kuhn, Lakatos and Aim-Oriented EmpiricismIn this paper I argue that aim-oriented empiricism (AOE), a conception of natural science that I have defended at some length elsewhere, is a kind of synthesis of the views of Popper, Kuhn and…Nicholas Maxwell·Aug 26, 2012SaveLearn
Criteria of Science, Cosmology, and Lessons of HistoryPerhaps more than any other of the physical sciences, cosmology exemplifies the inevitable contact between science and philosophy, including the problem of the demarcation criteria that distinguish…Helge Kragh·Aug 26, 2012SaveLearn
On The Theoretical Problematic of Arabic Physical Science Or Why Did Arabic Science Fail To Achieve The Copernican Revolution?A Hegelian version of the concept of problematic is used to investigate the underlying theoretical unity and structure of Arabic physical science (physics, astronomy and chemistry). A contradictory…Hisham Ghassib·Aug 26, 2012SaveLearn
A Theory of Scientific PracticeThis paper avers that science is not demarcated from other disciplines by a specific unique methodology, but by its specific scientific rationality and rational grounds. In this context, the notion…Hisham Ghassib·Aug 26, 2012SaveLearn
Einstein's Pathway to the Equivalence Principle 1905-1907Between 1905 and 1907, Einstein first tried to extend the special theory of relativity in such a way so as to explain gravitational phenomena. This was the most natural and simplest path to be taken.…Galina Weinstein·Aug 25, 2012SaveLearn
On emergence in gauge theories at the 't Hooft limitThe aim of this paper is to contribute to a better conceptual understanding of gauge quantum field theories, such as quantum chromodynamics, by discussing a famous physical limit, the 't Hooft…Nazim Bouatta, Jeremy Butterfield·Aug 24, 2012SaveLearn
Biography of eight astronomers and physicistsWe provide a brief biography of seven French astronomers and physicists and of a Russian astronomer from the 19th and 20th centuries. Roger Bouigue (1920-) was the director of Toulouse Observatory in…Emmanuel Davoust·Aug 23, 2012SaveLearn
The solar towers of ChankilloAn ancient solar observatory is composed by thirteen towers lined on a hill of a coastal desert of Peru. This is the Chankillo observatory. Here we discuss it, showing some simulations of the local…Amelia Carolina Sparavigna·Aug 17, 2012SaveLearn
Eight Physicists and Astronomers: Biographical PortraitsThis essay provides concise biographical information about eight physicists, astronomers, astrophysicists, and cosmologists from the twentieth century. The portrayed scientists are Hermann Bondi…Helge Kragh·Aug 15, 2012SaveLearn