Results 261 to 270 of about 23,286,764 (294)

Large antennas for ground-based astronomy above 1 THz

open access: yes, 2006
In its history astronomy has continuously expanded access to new wavelength regions both from space and on the ground. Today, one of the few unexplored regimes is the terahertz (THz) frequency range, more specifically above 1 THz (< lambda 300 mum ...
Stacey, G. J.   +9 more
exaly   +2 more sources

Ground-based astronomy

Physics Today, 1965
Late in 1962, the National Academy of Sciences established a panel of leading astronomers under the chairmanship of Albert E. Whitford, director of the University of California's Lick Observatory, to estimate the need for major new ground-based facilities for both optical and radio astronomy in the United States during the coming decade. The mission of
openaire   +1 more source

Status of ground-based gamma ray astronomy

AIP Conference Proceedings, 2005
The status of experimental TeV gamma ray astronomy is summarized, with emphasis on the newer results, which include the first image of a supernova shell with resolved morphology and the detection of the Galactic Centre region as a TeV source. A puzzle remains that a number of seemingly established southern TeV sources could not be confirmed in recent ...
openaire   +2 more sources

International Cooperation in Ground-Based Astronomy

Astrophysics and Space Science, 1997
The UN/ESA workshops aim to foster the development of basic space science in developing countries. It is argued that the involvement of these countries in international collaborations in ground-based astronomy is an effective method of achieving this aim.
openaire   +1 more source

The RANICON for Ground Based Optical Astronomy

1988
We have developed a versatile 2D photon counting imaging system that determines the location and arrival time of a detected photon with high precision and reliability. It makes use of a standard proximity focused semi-transparent photocathode to convert photons to electrons, coupled to a cascaded stack of microchannel plates acting as the position ...
Francesco Paresce   +6 more
openaire   +1 more source

Ground-based bistatic radar astronomy

Journal of Geophysical Research, 1965
Ground-based bistatic radar astronomy technique using distantly spaced receiver and transmitter in trial measurement of lunar angular ...
H. T. Howard, W. C. Erickson
openaire   +1 more source

Ground based low light astronomy

Contemporary Physics, 1977
Abstract Astronomy can be traced beck at least to the heyday of Egyptian pyramid building. It was practised mostly as the art and science of position and movement until in 1852, the introduction of the collodion plate developed from Louis Daguerre's earlier work, prompted the first stellar photograph. By 1884. William Huggins had added the spectroscope
openaire   +1 more source

Infrared Fourier spectrometer for airborne and ground-based astronomy

Applied Optics, 1980
A unique high resolving power near-infrared, astronomical Fourier spectrometer has been constructed foruse at both ground-based and airborne telescopes. Its capabilities include a limiting resolution of 0.01 cm(-1) and spectral coverage over the InSb detector sensitivity region (0.8-5.6 microm). The instrument is optimized for operation in environments
D S, Davis   +4 more
openaire   +2 more sources

Ground-Based Infrared Astronomy

1994
In this paper, I discuss ground-based infrared astronomy with emphasis on observations made during the last decade. I cover several topics including: 1) What makes a ground-based infrared telescope, 2) Coments on ground vs. space for infrared observations, 3) The science that has come from ground-based telescopes: star and planet formation, companions ...
openaire   +1 more source

Ground Based Astronomy with Adaptive Optics

2000
Adaptive optics for astronomy has been under intensive development for a decade now. Numerous facilities are in or near operation. The performance of ground based natural guide star systems is fairly well understood, and laser beacon development has made enormous progress also.
openaire   +1 more source

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