Results 61 to 70 of about 10,210 (220)

NEOMIR: ESA’s Space‐Based Infrared Mission for NEO Detection and Early Warning

Advances in Astronomy, Volume 2026, Issue 1, 2026.
The Near‐Earth Object Mission in the Infrared (NEOMIR) is European Space Agency’s (ESA’s) space‐based mission dedicated to discovering near‐Earth objects (NEOs). Its primary goal is to detect and provide early warnings for NEOs approaching Earth approaching from the near‐Sun direction, which are nearly impossible to observe using ground‐based optical ...
L. Conversi, J. Licandro, M. Delbo, A. Fitzsimmons, K. Muinonen, T. Müller, M. Popescu, P. Tanga, M. M. Revellino, M. Micheli, M. Fenucci, R. Moissl, Josep M. Trigo-Rodríguez   +12 more
wiley   +1 more source

Astrometric microlensing probes of the isolated neutron star population with Roman

Astronomy & Astrophysics
Context. Notoriously hard to detect and study, isolated neutron stars (NSs) might provide valuable answers to fundamental questions about stellar evolution and explosion physics.
Kaczmarek Z., Halasi-Kun A., McGill P., Perkins S. E., Dawson W. A.   +4 more
doaj   +1 more source

High-precision astrometry and the modelling of stellar spectra

, 1995
The impact of high-precision astrometry on modelling of stellar spectra and determination of fundamental stellar parameters for single stars is discussed.
Gustafsson, Bengt,
core  

Uncertainties in Historic Visual Double Star Measures—III Accurate Calibration Pairs

Astronomische Nachrichten, Volume 346, Issue 10, December 2025.
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

Measuring Titan’s rapid orbital expansion combining Cassini radio science normal points and astrometry

Astronomy & Astrophysics
Recent analyses of Titan’s orbital migration have yielded conflicting results regarding Saturn’s tidal dissipation (Q) at Titan’s frequency. While some studies reported a low Q consistent with resonance locking using independent radio science and ...
Magnanini Andrea, Lainey Valery, Gomez Casajus Luis, Zannoni Marco, Tortora Paolo   +4 more
doaj   +1 more source

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source

The Hubble Missing Globular Cluster Survey

Astronomy & Astrophysics
The Hubble Missing Globular Cluster Survey has secured high-quality astro-photometric data in two bands for 34 clusters never observed with HST. When combined with Gaia astrometry, this dataset enables the investigation of the bulk motion and the ...
Rosignoli L., Libralato M., Pascale R., Massari D., Dalessandro E., Ceccarelli E., Baumgardt H., Bellazzini M., Bellini A., Aguado-Agelet F., Cassisi S., Monelli M., Mucciarelli A., Pancino E., Salaris M., Dodd E., Ferraro F. R., Lanzoni B.   +17 more
doaj   +1 more source

Astrometry with Schmidt Telescopes [PDF]

International Astronomical Union Colloquium, 1984
Photographic astrometry, including work with Schmidt telescopes, can be divided into two main fields, (i) the measurement of positions of objects relative to a reference frame of stars with known celestial coordinates, and (ii) the measurement of relative proper motions and trigonometric parallaxes from a series of plates taken on the same field.
openaire   +1 more source

Astrometry

, 2007
The special VLBI techniques used to obtain accurate absolute or relative positions of radio sources are discussed. Contents 19.1 Types of Astrometry : : : : : : : : : : : : : : : : : : : : : : : 364 19.1.1 Absolute Astrometry : : : : : : : : : : : : :
Edward Fomalont
core  

Globally Critical Infrastructure: The Unique Risks and Challenges

Risk Analysis, Volume 45, Issue 12, Page 4804-4817, December 2025.
ABSTRACT Critical infrastructure is typically identified at the national level. However, disruption to certain infrastructure systems, facilities, and assets can have negative consequences for global societies. Such globally critical infrastructure entails a distinct risk profile for both countries dependent on the infrastructure, and countries that ...
Zachary Kallenborn, Henry H. Willis
wiley   +1 more source