SECTION ON ASTRONOMY (D) AND AMERICAN ASTRONOMICAL SOCIETY
نویسندگان
چکیده
منابع مشابه
American Astronomical Society – Division on Dynamical Astronomy
Currently, there are more than 100 confirmed multiple-planet systems. Moreover, a recent study by Kepler has identified 361 multiple-planet candidate systems. Investigating these systems would give us an important clue in understanding formation and evolution of planetary systems. In such multiple-planet systems, secular interactions among planets could play a significant role in determining th...
متن کاملAmerican Astronomical Society Division on Dynamical Astronomy
[1.01] Asteroids: Radar Observations and Dynamics S. J. Ostro (JPL/Caltech) Radar delay-Doppler measurements are powerful for refining asteroid orbits because they have extremely fine fractional precision and are orthogonal to optical angle astrometry. Radar detection of a newly discovered near-Earth asteroid (NEA) secures its orbit and can add centuries to the interval over which its close Ear...
متن کاملAmerican Physical Society New England Section Newsletter
This study explores the effect of Ag+ ions on transient photoconductivity of thin films of Se75Te20Ag5. The thin films of Se75Te20Ag5 chalcogenide alloys were made by evaporation method using a vacuum chamber at HBTI Kanpur, India. This amorphous system showed the presence of negative photocurrent when white light was stopped showing on the sample. The rise and decay of photoconductivity was ob...
متن کاملAmerican Astronomical Society • Provided by the NASA Astrophysics Data System
Two interacting galaxies and four central galaxies in cooling flow clusters were observed with the Hubble Space Telescope to look for young compact massive star clusters. The two interacting galaxies, NGC 3597 and NGC 6052, show clear evidence for resolved bright blue clusters that are likely to be comparable in mass to Galactic globulars based on their colors and brightnesses. In NGC 3597, the...
متن کاملAstronomy during the Early Years of the American Philosophical Society.
Astronomy During the Early Years of the American Reports: Philosophical Society: DR. S. A. MITCHELL .................. 489 First Report of the War Policy Committee of the American Institute of Physics .......... .............. 508 Obituary: Special Articles: Arthur Newell Talbot: PROFESSOR F. E. RICHART. The Biochemical Specificity of Sulfanilamide and Recent Deaths ......... 495 of Other Antib...
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: Science
سال: 1941
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.93.2406.125-a