... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... December 21, 1997 . ... Advantages are briefly discussed of gaining in spectral resolution, which is accompanied by losses in signal level, as compared with the attempts to improve the accuracy of measurement of line parameters by means of rising the S/N ratio alone with increasing the exposure time. To partially solve the problem of observations of faint objects at the BTA a new design echelle spectrometer is proposed. high resolution spectroscopy . ...

... Next: Unsupervised Catalog Classification Up: Object Detection and Previous: Classification of Objects . ... Multi-resolution allows for image analysis in terms of different scales. ... This approach is used for the detection (and subsequent analysis) of globular cluster systems around elliptical galaxies, and for image characterization and object trawling in large image databases. ... The applicability of this approach to object detection in large image collections has been investigated. ...

Target Acquisition Reference Information . Chapter 4 mentions acquisition methodologies for extended objects, and, in particular, the use of the EXTENDED Optional Parameter. In this section we provide some guidance on predicting the count rates to be expected during an acquisition of an extended object, especially one beyond our own Galaxy. The renewed availability of Side 1 of the GHRS and its G140L grating make it possible to get high-quality spectra of faint objects efficiently. ...

. Help | Comment | NED Home . Object name: . Extended name search? Yes No . System: Equatorial Ecliptic Galactic SuperGalactic Equinox: . Sort the output list by: RA or Longitude DEC or Latitude Galactic Longitude Galactic Latitude . Redshift/Velocity displayed as: Redshift Velocity (km/s) For velocities above km/s, display redshift as dimensionless z .

... Publications based on data obtained with the CRIRES instrument should quote the following reference paper: K ufl, H.U. et al. ... Questions related to service mode observations and proposal preparation should be addressed to the User Support Department. Questions related to visitor mode observations should be addressed to Paranal Science Operations . ... Overview: a short description of the instrument . ... Manuals: links to all the documents related to CRIRES. ... Instrument Operations Team . ...

... Астронет | ... Переменные Звезды | ... Микролинзирование . ... На протяжении последних нескольких лет в рамках проекта MACHO проводятся наблюдения микролинзирования звезд Большого Магелланова Облака - спутника нашей Галактики. Эффект микролинзирования заключается в гравитационной фокусировке света звезды массивным объектом, находящимся на луче зрения между звездой и наблюдателем. ... Согласно некоторым гипотезам, линзами могут являться реликтовые черные дыры или "нейтралинные звезды". ...