STScI . HST . ... Home . ... Data . ... Press Releases . ... NEW 12/14/2010 - WFPC2 ISR 2010-05: "WFPC2 Filters After 16 Years on Orbit" has been released. NEW 12/1/2010 - WFPC2 ISR 2010-04: "The Dependence of WFPC2 Charge Transfer Efficiency on Background Illumination" has been released. ... NEW 8/13/2010 - WFPC2 ISR 2010-03: "WFPC2 CTE for Extended Sources: I. Photometric Correction" has been released. ... NEW 6/24/2010 - WFPC2 ISR 2010-01: "WFPC2 Standard Star CTE" has been released. ...

... 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 . ...

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Next: The Multimission Archive at the Space Telescope Science Institute . Up: Archiving . ... As part of the agreement between NASA and ESA on the continuation of the collaboration on HST, the ST-ECF has been charged with the production of the Post Operational HST Science Instrument Archives (POA). Starting with the Faint Object Spectrograph the data from the instruments which have been removed from the HST will be re-calibrated and made accessible in a uniform manner. ... Rosa 2 . ...

... Archives . ... Differential Emission Measure [Eqn] . ... Astro 301, class 1, and it took all of 20 minutes of talk about stellar magnitudes to put that notion to permanent rest. ... Now, it turns out that the human eye perceives brightness on a log scale, so magnitudes are numerically similar to log (brightness). ... frac{5}{2}\log_{10}\left(\frac{f_{object}}{f_{standard}}\right) \,,$$ . ... frac{5}{2}\log_{10}\left(\frac{L_{object}}{4 \pi d^2}\frac{1}{f_{standard}}\right) \,.$ ... Chandra Blog . ...

... Search . ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Parkes | ... A Search for Bright Kuiper Belt Objects . ... Since 1992, 60 large Kuiper belt objects have been detected by ground-based telescopes. ... The detection of brighter objects would improve our ability to determine the Kuiper belt objects' surface composition and provide constraints on the population statistics of different formation mechanisms. ...

Supernova discovery statistics for 2003 . ... Sorted by Name For the year 2003 , 369 supernovae and 27 extragalactic novae were reported. 334 of these supernovae were named by CBAT, 1 were given possible supernova designations, and 34 were not reported to CBAT. 71 supernovae were found in NGC/IC galaxies, 178 were found in named galaxies 123 objects were discovered by amateurs 1 were brighter than 13th Magnitude 34 were brighter than 16th Magnitude 145 were brighter than 18th Magnitude 198 ...

... 2004: . ... An increase in star brightness is followed by a decrease in asphericity and wind velocity to the point where stationary and even accreting fraction of the wind appears in extremely bright objects together with a flowing out fraction. ... Based on an analysis of observations obtained with BTA and on the published data it was found that degree of abnormality of energy distribution in continuum of magnetic chemically peculiar stars increases with an increase of their rotation period. ...

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 . ...