Lunar Libration . Articles | ... Actually, a slight rocking motion, called libration,* makes about 59% of the Moon's surface visible from our planet Earth -- though only 50% at any one time. ... Add to that, the approximate 1.5 degree tilt of the Moon's equator to the ecliptic, and you have the inclination of the Moon's equator to the plane of its orbit around Earth at some 6.5 degrees (5 + 1.5 = 6.5). ... Re-published on Astronomy Net with permission of the author. ... www.astronomy.net . ...

... Each ferrule will be used to plug approximately 300 holes. We must be sure the ferrules will not wear excessively during use; 1 mil reduction in diameter of a ferrule is enough to reduce light throughput by approximately 1%. ... Stainless steel ferrules offer lower precision (which will lose us approximately 1/2 to 1% light compared to ceramic), but they are relatively inexpensive, readily available with the hole diameter we require, and immune to cracking. ... Hence the wear was not very deep. ...

... Chilingarian, I., Melchior, A.-L., Zolotukhin, I. 2010: Analytical approximations of K -corrections in optical and near-infrared bands , MNRAS, v. 405, p. 1409 (also arXiv:1002.2360) . ... Calculator . ... calculate spectral energy distributions , K-corrections calculator , UKIDSS YJHK , K-corrections of galaxies , spectral based k-corrections , SDSS filter set K-corrections , K correction code IDL , kcorrect IDL C , . ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Winer Observatory) was incorporated in 1983 as a 501(c)(3) non-profit public charity to perform basic research in astronomy, provide educational outreach programs, and provide site and maintenance services for small telescopes through cooperative agreements with other astronomical institutions. ... The picture at the top left of this page is of our facility near Sonoita, Arizona, approximately 50 miles southeast of Tucson, Arizona. ...

... A tussle in the distant Universe. This Hubble Space Telescope image shows evidence for a merger between a quasar and a companion galaxy. The quasar is the bright object just beneath the image center, and the wisps of material around it are remains of a galaxy disrupted by the interaction between it and the quasar. ... Galactic Nuclei: Old Quasars? Quasars as Probes of the Distant Universe . ... Quasars. ... The name quasar is made up with parts of the words "quasi-stellar radio." ...

В данном документе приведены основные положения допустимого использования сети "Russian Space Science Internet/Российская Космическая Научная Сеть Интернет" и основные принципы развития сети. ... Российская Космическая Научная Сеть Интернет поддерживает космические и научно-исследовательские проекты ведущих научных центров России и мира. ... Российская Космическая Научная Сеть Интернет поддерживает медицинские исследования и передовые медицинские технологии. ... Специфика сети. ...

... Space Flight . ... It took an accidental dose of cosmic rays to make them fantastic.( ... Air showers ensuing from very-high-energy cosmic rays which can enter EarthтАЩs atmosphere from multiple directions.( ... The latest cosmic ray research:composite sky catalogue using 2 years of Fermi Gamma-ray Space Telescope data.Depicting 1873 objects in total, the brightest patches represent sources with the highest gamma-ray count (at energies greater than 1 billion GeV or electron volts).( ... Astronotes ....

... Recent applications of multi-spectral imaging in auroral research are combining these dimensions, providing a new perspective on the poorly understood physics of magnetosphere-ionosphere coupling. ... He is an Associate Editor for the Journal of Geophysical Research. ... Please join us for a pre-meeting dinner discussion at Changsho, 1712 Mass Ave, Cambridge, MA at 6:00pm before the meeting. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Солнечная система . ... Она посвящена астрономии и всему, что с ней связано: рефераты, биографии знаменитых астрономов, космонавтов, и.т.д., и.т.п. Если у Вас есть какая-либо интересная информация, и, или интересные ссылки, Вы можете связаться со мной по электронной почте: kol2000@mail.ru . ... Рефераты ? выложены найденные мной рефераты и доклады по астрономии. ... Надеюсь на взаимное сотрудничество. ... kol2000.narod.ru . ... Copyright ї 2001-2012, Колесников Александр ( kol2000@mail.ru ) . ...