Results 31 to 40 of about 4,968 (216)
, 2022 In the last years, precision astrometry has shown incredible potential as a tool to investigate the formation and evolution of our Galaxy and the Local Group. The future for this kind of science appears even brighter, with several facilities that will be dedicated to its further development. In this talk I will focus on MICADO, which is the first-light
openaire +1 more source
Astrometry of Circumstellar Masers [PDF]
, 2003 8 pages, 2 figures, to appear in "Mass-losing Stars and their Circumstellar Matter", eds Y. Nakada & M.
Wouter Vlemmings, H. J. van Langevelde
openaire +3 more sources
Open Astronomy, 2011 Technological and scientific developments during the past century made a new branch of astronomy flourish, i.e. astrophysics, and resulted in our present deep understanding of the whole Universe.
Høg E.
doaj +1 more source
Connecting VLBI and Gaia celestial reference frames
Frontiers in Astronomy and Space Sciences, 2016 The current state of the link problem between radio and optical celestial reference frames is considered.The main objectives of the investigations in this direction during the next few years are the preparation of a comparisonand the mutual orientation ...
Zinovy Malkin
doaj +1 more source
Gaia: The Astrometry Revolution [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractThe power of micro-arcsecond (μas) astrometry is about to be unleashed. ESA's Gaia mission, now headed towards the end of the first year of routine science operations, will soon fulfil its promise for revolutionary science in countless aspects of Galactic astronomy and astrophysics.
SOZZETTI, Alessandro +4 more
openaire +5 more sources
Uncertainties in Historic Visual Double Star Measures—III Accurate Calibration Pairs
Astronomische Nachrichten, EarlyView.ABSTRACT Based on space‐based positions and proper motions, we present accurate rectilinear elements for 857 double star pairs over the celestial sphere. These elements allow for the computation of precision ephemeris Position Angles and Separations of these pairs.
Roderick R. Letchford, Graeme L. White
wiley +1 more source
Gaia DR2 Distances to Planetary Nebulae
Galaxies, 2020 The aim of this work is to examine distances to planetary nebulae (PNe) together with other properties that were derived from them, using the astrometry of Gaia Data Release 2 (DR2).
Iker González-Santamaría +4 more
doaj +1 more source
Earth and Space Science, Volume 12, Issue 10, October 2025.Abstract High‐precision Earth Rotation Parameter (ERP) products often experience delays that range from several days to weeks. The use of precise forecasting models can effectively compensate for the impact of such delays. Based on a systematic analysis of the forecasting capabilities of the traditional harmonic least squares fitting and autoregressive
Chen Ren +4 more
wiley +1 more source
The Astronomical JournalSince the advent of Gaia catalog, positional precision of a ground-based telescope can be greatly improved by correction of more subtle errors, including positional biases induced by atmospheric turbulence, and some instrumental factors such as geometric
Z. J. Zheng +3 more
doaj +1 more source
Astrometric star catalogues as combination of Hipparcos/Tycho catalogues with ground-based observations [PDF]
Serbian Astronomical Journal, 2004 The successful ESA mission Hipparcos provided very precise parallaxes positions and proper motions of many stars in optical wavelength. Therefore it is a primary representation of International Celestial Reference System in this wavelength.
Vondrák J.
doaj +1 more source