Effects of artificial light to astronomical observations
نویسندگان
چکیده
منابع مشابه
The Effects of Atmospheric Turbulence on Astronomical Observations
Turbulence in the Earth’s atmosphere is a major obstacle to the detection of planets with coronographic and interferometric methods from the ground. It limits the contrast achievable with high-resolution imaging and the precision of astrometric measurements. Atmospheric turbulence also determines many of the key design parameters of adaptive optics systems and interferometers: site selection, o...
متن کاملScheduling Tools for Astronomical Observations
A key challenge for the new generation of 8m class facilities will be ensuring that the best observing conditions are fully exploited to carry out unique science | science that can only be accomplished when these conditions obtain. Flexible scheduling is one approach to this problem: by scheduling a mix of observations from a pool of available observing programs, it is possible to select best m...
متن کاملEffects of breeding density, feeding cycle, and light environment on the artificial culture of Poecilobdella manillensis
To provide a scientific basis for artificial culture, the effects of different breeding densities, feeding cycles, and light environments on the growth regulation of Poecilobdella manillensis were studied. After P. manillensis were cultured at breeding densities of 250 ~ 3250 leeches m-2; feeding cycles of 2 ~ 16 days; and a light environment with noise or a light-free environment without noise...
متن کاملLaser frequency combs for astronomical observations.
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require measurements of Doppler velocity drifts of approximately 1 centimeter per second per year, and astronomical spectrographs have not yet been calibrated to this tolerance. We demonstrated the first use of a lase...
متن کاملSpeckle Imaging: a Boon for Astronomical Observations
The speckle imaging is a photographic technique that resolves objects viewed through severely distorted media. The results are insensitive to the errors caused by apparent size of the isoplanatic patch and the telescope aberrations. In this article, a short descriptions of the atmospheric turbulence and its effect on the flat wavefront from a stellar source is presented; the shortcomings of the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Illuminating Engineering Institute of Japan
سال: 1989
ISSN: 0019-2341,1349-838X,2185-1506
DOI: 10.2150/jieij1980.73.4_178