scholarly journals Photography in Stellar Astronomy

Nature ◽  
1941 ◽  
Vol 148 (3752) ◽  
pp. 369-369
Keyword(s):  
Stellar Astronomy

On the matter of proving Euclidean fifth postulate and the origin of non-Euclidean geometries

2019 ◽  
Vol 950 (8) ◽  
pp. 2-11
Author(s):  
S.A. Tolchelnikova ◽  
K.N. Naumov
Keyword(s):  
Celestial Mechanics ◽  
Natural Philosophy ◽  
Relativity Theory ◽  
Theory Of Relativity ◽  
The Third ◽  
Stellar Astronomy ◽  
Spherical Surfaces ◽  
Mathematical System ◽  
Solar System Bodies ◽  
The Universe

The Euclidean geometry was developed as a mathematical system due to generalizing thousands years of measurements on the plane and spherical surfaces. The development of celestial mechanics and stellar astronomy confirmed its validity as mathematical principles of natural philosophy, in particular for studying the Solar System bodies’ and Galaxy stars motions. In the non-Euclidean geometries by Lobachevsky and Riemann, the third axiom of modern geometry manuals is substituted. We show that the third axiom of these manuals is a corollary of the Fifth Euclidean postulate. The idea of spherical, Riemannian space of the Universe and local curvatures of space, depending on body mass, was inculcated into celestial mechanics, astronomy and geodesy along with the theory of relativity. The mathematical apparatus of the relativity theory was created from immeasurable quantities

Solving Stellar Astronomy Problems in the Orbital Stellar Stereoscopic Observatory Project

2015 ◽  
Vol 24 (1) ◽  
Author(s):  
M. S. Chubey ◽  
V. V. Kouprianov ◽  
V. N. L’vov ◽  
S. V. Markelov ◽  
A. V. Bakholdin ◽  
...  
Keyword(s):  
Libration Points ◽  
Stellar Astronomy

AbstractWe propose to establish an Orbital Stellar Stereoscopic Observatory (OStSO) consisting of two identically equipped spacecrafts (SCs) in the vicinity of two Lagrangian libration points,

scholarly journals Artificial Intelligence as a positive and negative factor in global risk

2008 ◽  
Author(s):  
Eliezer Yudkowsky
Keyword(s):  
Artificial Intelligence ◽  
Gene Pool ◽  
Cognitive Biases ◽  
Time Pressure ◽  
Upper Bounds ◽  
Global Risk ◽  
Theory Of Evolution ◽  
Cognitive Busyness ◽  
Stellar Astronomy ◽  
Biological Adaptation

By far the greatest danger of Artificial Intelligence (AI) is that people conclude too early that they understand it. Of course, this problem is not limited to the field of AI. Jacques Monod wrote: ‘A curious aspect of the theory of evolution is that everybody thinks he understands it’ (Monod, 1974). The problem seems to be unusually acute in Artificial Intelligence. The field of AI has a reputation for making huge promises and then failing to deliver on them. Most observers conclude that AI is hard, as indeed it is. But the embarrassment does not stem from the difficulty. It is difficult to build a star from hydrogen, but the field of stellar astronomy does not have a terrible reputation for promising to build stars and then failing. The critical inference is not that AI is hard, but that, for some reason, it is very easy for people to think they know far more about AI than they actually do. It may be tempting to ignore Artificial Intelligence because, of all the global risks discussed in this book, AI is probably hardest to discuss. We cannot consult actuarial statistics to assign small annual probabilities of catastrophe, as with asteroid strikes. We cannot use calculations from a precise, precisely confirmed model to rule out events or place infinitesimal upper bounds on their probability, as with proposed physics disasters. But this makes AI catastrophes more worrisome, not less. The effect of many cognitive biases has been found to increase with time pressure, cognitive busyness, or sparse information. Which is to say that the more difficult the analytic challenge, the more important it is to avoid or reduce bias. Therefore I strongly recommend reading my other chapter (Chapter 5) in this book before continuing with this chapter. When something is universal enough in our everyday lives, we take it for granted to the point of forgetting it exists. Imagine a complex biological adaptation with ten necessary parts. If each of the ten genes is independently at 50% frequency in the gene pool – each gene possessed by only half the organisms in that species – then, on average, only 1 in 1024 organisms will possess the full, functioning adaptation.

scholarly journals Science of the Vatican Observatory since 2000

2020 ◽  
Vol 7 (2) ◽  
pp. 282-298
Author(s):  
Guy Consolmagno, S.J.
Keyword(s):  
Scientific Work ◽  
Advanced Technology ◽  
Research Programs ◽  
Research Areas ◽  
Stellar Astronomy ◽  
University Of Arizona ◽  
To Come ◽  
The Individual ◽  
The University

Five research areas have been the focus of the scientific work of the Specola Vaticana (Vatican Observatory) over the past twenty years: planetary sciences, stellar astronomy, extragalactic astronomy, cosmology, and the development of the Vatican Advanced Technology Telescope (vatt). The choice of research program is left to the individual astronomers, all of whom work closely with lay collaborators around the world. Notable, especially in connection with the vatt, is the close coordination of the Specola with the Steward Observatory of the University of Arizona. One unique strength of the Specola is its independence from short-term funding requirements. As a result of its stable funding, Specola astronomers can engage in long-term research programs such as surveys of meteorite properties, exoplanets, stellar clusters, and galaxy clusters, which may take ten or more years to come to fruition. In this way the Specola complements the large research programs of contemporary astronomy.

scholarly journals Possibilities of Sub-Milliarcsecond Astrometry in the LOMONOSOV Project

1995 ◽  
Vol 166 ◽  
pp. 336-336
Author(s):  
A.M. Cherepashchuk ◽  
V.V. Nesterov ◽  
E.K. Sheffer
Keyword(s):  
Accuracy Improvement ◽  
Technical Problems ◽  
Stellar Astronomy ◽  
Mirror Telescope

Scientific and technical problems of accuracy improvement of stellar position measurements in the LOMONOSOV project are discussed. In contrast to the HIPPARCOS project, in our project we use a steerable satellite with a three-axis spatial stabilization. A Cassegrain-type 1-meter mirror telescope will be mounted on board of the satellite. We discuss scientific goals in astrophysics, stellar astronomy and astrometry, for which the knowledge of stellar positions with sub-milliarcsecond accuracy is necessary.

scholarly journals Fifteen years of “Sonderforschungsbereich” in Heidelberg: Research on circumstellar matter

1987 ◽  
Vol 122 ◽  
pp. 1-3
Author(s):  
B. Baschek
Keyword(s):  
Circumstellar Matter ◽  
General Concept ◽  
International Astronomical Union ◽  
International Conference ◽  
Stellar Astronomy ◽  
Research Activities ◽  
International Astronomical ◽  
Astronomical Research ◽  
Important Time ◽  
The University

At the end of this year, the Sonderforschungsbereich (Special Collaborative Programme) no. 132 on “Theoretical and Observational Stellar Astronomy” in Heidelberg will terminate after fifteen years. Although 15 years are only 2 1/2 per cent of the age of the University of Heidelberg, which is celebrating its 600 th anniversary this year, they are nevertheless a long and important time for astronomical research in Heidelberg. On the occasion of the termination of the Sonderforschungsbereich, we are now given the opportunity to present an essential part of its research, namely that on circumstellar matter at an international conference, and we are grateful to the International Astronomical Union that this could be realized, and that we can welcome here so many participants to this Symposium. As the Speaker of our Sonderforschungsbereich I would like to briefly introduce to you the general concept of the institution of an SFB and give an overview over its structure and research activities.

Thomas Wright and Immanuel Kant, Pioneers in Stellar Astronomy

Nature ◽  
1951 ◽  
Vol 167 (4260) ◽  
pp. 1014-1016 ◽  
Author(s):  
F. A. PANETH
Keyword(s):  
Immanuel Kant ◽  
Stellar Astronomy

scholarly journals Circumbinary Planets and the SOLARIS Project

2011 ◽  
Vol 7 (S282) ◽  
pp. 111-116 ◽  
Author(s):  
Maciej Konacki ◽  
Piotr Sybilski ◽  
Stanisław K. Kozłowski ◽  
Milena Ratajczak ◽  
Krzysztof G. Hełminiak
Keyword(s):  
South America ◽  
Binary Stars ◽  
Extrasolar Planets ◽  
Binary Star ◽  
Multiple Star ◽  
Eclipsing Binary ◽  
Stellar Astronomy ◽  
Eclipsing Binary Stars ◽  
Spectroscopic Binary ◽  
Circumbinary Planets

AbstractExtrasolar planets in binary and multiple star systems have become a noticeable niche with about 50 planets among over 500 known. Here we however focus on a particular subset of exoplanets in binary star systems — circumbinary planets. They have the unique advantage that a search for circumbinary planets does also significantly contribute to the understanding of their parent stars. We review what is currently known about circumbinary planets and then introduce our two projects aimed at detecting circumbinary planets: The TATOOINE project to find circumbinary planets around non-eclipsing double-lined spectroscopic binary stars with precision radial velocities, and the SOLARIS project to detect circumbinary planets with the timing of eclipses of eclipsing binary stars. For the SOLARIS project, we were granted 2.6 million USD to establish a network of at least four robotic 0.5-m telescopes on three continents (Australia, Africa and South America) to carry out precision photometry of a sample of eclipsing binary stars. We expect that both projects will have a large impact also on the observational stellar astronomy.

Astrophysics and Stellar Astronomy

1970 ◽  
Vol 38 (3) ◽  
pp. 396-397
Author(s):  
Thomas L. Swthart ◽  
F. R. Zabriskie
Keyword(s):  
Stellar Astronomy
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