Results 21 to 30 of about 788,098 (285)
International Year of Astronomy (IYA 2009): Selected Resources.
The article reviews web sites on general astronomy and 2009 International Year of Astronomy (IYA) such as the following, available at http://www.astronomy2009.org, 100 Hours of Astronomy available at http://www.100hoursofastronomy.org and Dark Skies ...
Mandy Taha, Joseph R. Kraus
doaj +1 more source
Entre L’Introductoire d’astronomie, première œuvre astronomique écrite en français ca 1270, et une compilation jusqu’alors inconnue des passages astronomiques de L’Image du monde, datant du premier quart du xve siècle, les traditions astronomiques latine
Pauline Lambert
doaj +1 more source
Reionization: Characteristic Scales, Topology and Observability [PDF]
Recently the numerical simulations of the process of reionization of the universe at z>6 have made a qualitative leap forward, reaching sufficient sizes and dynamic range to determine the characteristic scales of this process.
A. Bunker +26 more
core +1 more source
This is the first of a series of notes on the technical lexicon of Greek astronomy. Between the 5th and 4th centuries BC, in Greece, the study of the sky becomes an autonomous discipline, whose concepts and practices favour the formation of a specific ...
Luca Simeoni
doaj +1 more source
Astronomical Investigation to Verify the Calendar Theory of the Nasca Lines
As in many regions of the world, astronomy also played a major role in the ancient Peruvian cultures. However, the discussion of the astronomical relevance of the Nasca geoglyphs is very controversial.
Christiane Richter +2 more
doaj +1 more source
Telaah Ayat-Ayat Hisab Rukyah Perspektif Astronomi
The discourse of the verses of the Qur’an regarding the reckoning (hisab) and determining date by sighting of moon (rukyat) did not find passages that describe implicitly on an initial determination by using the lunar month of reckoning, but explicitly ...
Nursodik Nursodik
doaj +1 more source
Jets, Disks and Winds from Spinning Black Holes: Nature or Nurture?
A brief summary is given of an alternative interpretation of the Event Horizon Telescope observations of the massive black hole in the nucleus of the nearby galaxy M87. It is proposed that the flow is primarily powered by the black hole rotation, not the
Roger Blandford, Noémie Globus
doaj +1 more source
Laboratory Astrophysics and the State of Astronomy and Astrophysics [PDF]
Laboratory astrophysics and complementary theoretical calculations are the foundations of astronomy and astrophysics and will remain so into the foreseeable future.
: +13 more
core +3 more sources
An Online Tutor for Astronomy: The GEAS Self-Review Library
We introduce an interactive online resource for use by students and college instructors in introductory astronomy courses. The General Education Astronomy Source (GEAS) online tutor guides students developing mastery of core astronomical concepts and ...
Muise, Amy Smith, Vogt, Nicole P.
core +2 more sources
Analysing Astronomy Algorithms for GPUs and Beyond [PDF]
Astronomy depends on ever increasing computing power. Processor clock-rates have plateaued, and increased performance is now appearing in the form of additional processor cores on a single chip. This poses significant challenges to the astronomy software
Amdahl +26 more
core +2 more sources

