Results 1 to 10 of about 10,395 (161)

Zainteresowania astronomiczne dzieci ukryte w pytaniach do astronauty

open access: yesProblemy Wczesnej Edukacji
This article focuses on presenting children’s questions addressed to astronaut Sławosz Uznański‑Wiśniewski, who was on the International Space Station in June 2025.
Jan Amos Jelinek
doaj   +1 more source

Solar eclipse represented in the petroglyphs of Vigirima (Venezuela)

open access: yesVirtual Archaeology Review, 2013
The Vigirima archaeological complex is characterised by the abundant presence of lithic sites whose age is unknown. The land registry of the petroglyphs, the revision of the techniques and styles used in its execution and the classification of the ...
Nelson Falcón
doaj   +1 more source

Reduced Solar Quadrupole Moment Compensates for Lack of Asteroids in Long-term Solar System Integrations

open access: yesThe Astronomical Journal
State-of-the-art long-term solar system integrations include several second order effects such as the Sun’s quadrupole moment J _2 and a contribution from asteroids (plus the Moon and general relativity).
Richard E. Zeebe, Ilja J. Kocken
doaj   +1 more source

Active Galactic Nuclei at All Wavelengths and from All Angles

open access: yesFrontiers in Astronomy and Space Sciences, 2017
AGN are quite unique astronomical sources emitting over more than 20 orders of magnitude in frequency, with different electromagnetic bands providing windows on different sub-structures and their physics.
Paolo Padovani
doaj   +1 more source

The Physical and Mathematical Meaning of Temperature and Its Implications for Astronomy

open access: yesGalaxies
Temperatures reported for astronomical objects are commonly extreme, and all are ascertained indirectly, using spectroscopy. However, narrow spectral peaks record microscopic behavior (transitions), whereas temperature is a macroscopic (bulk) feature of ...
Robert E. Criss, Anne M. Hofmeister
doaj   +1 more source

High Resolution Gravitational Lens Model

open access: yesOpen Astronomy, 2015
A new model of gravitational lens – high-resolution gravitational lens based on the metric of gravitational field produced by N moving and rotating finite-sized bodies – is proposed. The model is applied to the case of a double galaxy gravitational lens.
Chechin L. M.
doaj   +1 more source

Exploring student estimates of astronomical scales: Impact of question formulation and visualization

open access: yesPhysical Review Physics Education Research
Estimating astronomical scales requires multiple complex mental processes, such as spatial thinking and interpreting large numbers. As such, it is a nontrivial question how these estimates can be most efficiently assessed. There is reason to believe that
Willem Keppens   +4 more
doaj   +1 more source

Semantic difficulties of the English aerospace terminological system

open access: yesChallenges and Issues of Modern Science
The Purpose of the research is to describe the modern system of astronomical and rocket engineering terminology and to investigate the peculiarities of the translation of the relevant terms into the Ukrainian language.
Irina Suima
doaj  

Bayesian Model Reconstruction Based on Spectral Line Observations

open access: yesThe Astrophysical Journal Supplement Series
Spectral line observations encode a wealth of information. A key challenge, therefore, lies in the interpretation of these observations in terms of models to derive the physical and chemical properties of the astronomical environments from which they ...
Frederik De Ceuster   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy