Results 21 to 30 of about 14,635 (238)

The Parkes Galactic Meridian Survey (PGMS): observations and CMB polarization foreground analysis [PDF]

open access: yes, 2010
We present observations and CMB foreground analysis of the Parkes Galactic Meridian Survey (PGMS), an investigation of the Galactic latitude behaviour of the polarized synchrotron emission at 2.3 GHz with the Parkes Radio Telescope.
Amarie   +51 more
core   +3 more sources

Ptolemaic Orbs in Twelfth-Century England: A Study and Edition of the Anonymous Liber de motibus planetarum

open access: yesMediterranea, 2018
This article offers the first study and critical edition of the Liber de motibus planetarum (Lmp), a neglected Latin text on planetary theory that appears anonymously and without any clear indication of date or place of origin in nine manuscripts of the ...
C. Philipp E. Nothaft
doaj   +1 more source

Archaeoastronomy in the Khmer heartland [PDF]

open access: yes, 2016
The heartland of the Khmer empire is literally crowded by magnificent monuments built in the course of many centuries. These monuments include the world-famous state-temples, such as Angkor Wat, but also many other temples and huge water reservoirs ...
Magli, Giulio
core   +3 more sources

Anders Celsius’ Contributions to Meridian Arc Measurements and the Establishment of an Astronomical Observatory in Uppsala

open access: yesOpen Astronomy, 2011
Astronomy has been on the curriculum of Uppsala University from at least the middle of the 15th century. However, since Uppsala also was the ecclesiastical centre of Sweden, the acceptance of new ideas, such as the Copernican heliocentric system, was ...
Stempels H. C.
doaj   +1 more source

LUCIAN AND THE GREAT MOON HOAX OF 1835

open access: yesAkroterion, 2012
The science of astronomy has had a long and distinguished history at the Cape of Good Hope (hereafter referred to as “the Cape”). This is no accident, since Cape Town was for many years (since 1652, in fact) the only fortified and inhabited European ...
J.L. Hilton
doaj   +1 more source

The Development of the Classical Observatory: From a Functional Shelter for the Telescope to the Temple of Science

open access: yesActa Baltica Historiae et Philosophiae Scientiarum, 2013
At the end of the 18th century and at the beginning of the 19th century, observatory buildings underwent a change, because astronomical tools of observation had transformed from light portable equipment into permanently mounted accurate instruments. For
Tapio Markkanen
doaj   +1 more source

Cool spots on the surface of the active giant PZ Mon [PDF]

open access: yes, 2019
Based on the multiband (BVRIJHKL) photometric observations of the active red giant PZ Mon performed for the first time in the winter season of 2017-2018, we have determined the main characteristics of the spotted stellar surface in a parametric three ...
Antonyuk, K. A.   +6 more
core   +1 more source

APASS Landolt-Sloan BVgri photometry of RAVE stars. I. Data, effective temperatures and reddenings [PDF]

open access: yes, 2014
We provide APASS photometry in the Landolt BV and Sloan g'r'i' bands for all the 425,743 stars included in the latest 4th RAVE Data Release. The internal accuracy of the APASS photometry of RAVE stars, expressed as error of the mean of data obtained and ...
Bienaymé, O.   +27 more
core   +4 more sources

GIER: A Danish computer from 1961 with a role in the modern revolution of astronomy

open access: yes, 2017
A Danish computer, GIER, from 1961 played a vital role in the development of a new method for astrometric measurement. This method, photon counting astrometry, ultimately led to two satellites with a significant role in the modern revolution of astronomy.
Høg, Erik
core   +1 more source

Copernicus's Heliograph at Olsztyn -- the 500th Anniversary of a Scientific Milestone

open access: yes, 2017
Exactly 500 years ago, Nicolaus Copernicus drew a lattice of lines on a panel above the doorway to his rooms at Olsztyn Castle, then in the Bishopric of Warmia.
Fischer, Gordon, Graßhoff, Gerd
core   +1 more source

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