Results 31 to 40 of about 132,526 (321)

Exploration of Large Digital Sky Surveys [PDF]

, 2000
We review some of the scientific opportunities and technical challenges posed by the exploration of the large digital sky surveys, in the context of a Virtual Observatory (VO).
A. A. Mahabal, D. Curkendall, J. Jacob, Observatorio Nacional, P. Stolorz, R. Granat, R. J. Brunner, R. R De, R. R. Gal, Rio De Janeiro, S. C. Odewahn, S. Castro, S. G. Djorgovski   +12 more
core   +3 more sources

Descent trajectory reconstruction and landing site positioning of Chang’E-4 on the lunar farside

Nature Communications, 2019
The Chang’E-4 mission in January 2019 had the major challenge to land on the lunar far side without traditional radiometric techniques due to the missing line-of-sight.
Jianjun Liu, Xin Ren, Wei Yan, Chunlai Li, He Zhang, Yang Jia, Xingguo Zeng, Wangli Chen, Xingye Gao, Dawei Liu, Xu Tan, Xiaoxia Zhang, Tao Ni, Hongbo Zhang, Wei Zuo, Yan Su, Weibin Wen   +16 more
doaj   +1 more source

Search and Discovery Tools for Astronomical On-line Resources and Services [PDF]

, 2000
A growing number of astronomical resources and data or information services are made available through the Internet. However valuable information is frequently hidden in a deluge of non-pertinent or non up-to-date documents.
Egret, Daniel, Hanisch, Robert J., Murtagh, Fionn   +2 more
core   +2 more sources

An Empirical Model to Estimate Abundance of Nanophase Metallic Iron (npFe⁰) in Lunar Soils

Remote Sensing, 2020
Lunar soils gradually become mature when they are exposed to a space environment, and nanophase metallic iron (npFe0) generates within them. npFe0 significantly changes the optical properties of lunar soils and affects the interpretation of the remotely ...
Dawei Liu, Yuanzhi Zhang, Guangliang Zhang, Bin Liu, Xin Ren, Rui Xu, Chunlai Li   +6 more
doaj   +1 more source

Astrometry with the Wide-Field Infrared Space Telescope [PDF]

Journal of Astronomical Telescopes Instruments and Systems, 2017
The Wide-Field Infrared Space Telescope (WFIRST) will be capable of delivering precise astrometry for faint sources over the enormous field of view of its main camera, the Wide-Field Imager (WFI). This unprecedented combination will be transformative for
R. Sanderson, A. Bellini, S. Casertano, Jessica R. Lu, Peter Melchior, M. Libralato, D. Bennett, M. Shao, J. Rhodes, S. Sohn, S. Malhotra, S. Gaudi, S. M. Fall, E. Nelan, P. Guhathakurta, Jay Anderson, Shirley Ho Department of PhysicsAstronomy, U. O. O. Astrophysics, Flatiron Institute Tapir, C. I. O. Technology., Space Telescope Science Institute, D. O. Astronomy, U. California, Berkeley, D. Sciences, Princeton University, A. Division, Nasa Goddard Space Flight Center, Jet propulsion Laboratory, O. University, University of California at Santa Cruz   +30 more
semanticscholar   +1 more source

Wavelength Calibration for the LIBS Spectra of the Zhurong Mars Rover

Remote Sensing, 2023
China’s first Mars rover, Zhurong, landed on the southern region of Utopia Planitia, Mars, on 14 May 2021 (UTC). Zhurong is equipped with the Mars Surface Composition Detection Package (MarSCoDe), which analyzes the Martian surface’s material composition.
Yizhong Zhang, Xin Ren, Zhaopeng Chen, Wangli Chen, Zhenqiang Zhang, Xiangfeng Liu, Weiming Xu, Jianjun Liu, Chunlai Li   +8 more
doaj   +1 more source

On the Origin of the 3.3 Micron Unidentified Infrared Emission Feature [PDF]

, 2017
The 3.3 $\mu$m unidentified infrared emission feature is commonly attributed to C-H stretching band of aromatic molecules. Astronomical observations have shown that this feature is composed of two separate bands at 3.28 and 3.30 $\mu$m and the origin of ...
Kwok, Sun, Sadjadi, Seyedabdolreza, Zhang, Yong   +2 more
core   +2 more sources

SUPPORT VECTOR MACHINE METHOD TO IDENTIFY AND CLASSIFY ASTRONOMICAL OBJECTS

International Journal of Engineering Applied Sciences and Technology, 2020
- Astronomy is the exploration of celestial objects, for instance, the moon, planets, stars, universes and for the most part everything beyond the Earth’s atmosphere.
Sunitha P, N. Venkatesh, Atreya B. M
semanticscholar   +1 more source

Orbital motions as gradiometers for post-Newtonian tidal effects [PDF]

, 2014
The direct long-term changes occurring in the orbital dynamics of a local gravitationally bound binary system $S$ due to the post-Newtonian tidal acceleration caused by an external massive source are investigated.
Iorio, Lorenzo
core   +3 more sources

OPTICON: EC Optical Infrared Coordination Network for Astronomy [PDF]

, 2001
OPTICON, the ICN Optical Infrared Coordination Network for Astronomy, brings together for the first time the operators of all Europe's medium to large optical-infrared telescopes, the largest corresponding data archives, and several user representatives.
Gilmore, Gerard
core   +2 more sources