... A non-linear relationship is observed between the sky brightness on clear and overcast nights, with a change in behavior near the rural to urban landuse transition. ... The great variation in skyglow radiance observed from site-to-site and with changing meteorological conditions underlines the need for a long-term international monitoring program. he introduction of artificial light has caused an unprecedented disruption to the nighttime environment over large areas of the Earth. ... Data processing...

Johnson: Today is March 19th, 2007. We are at NASA Headquarters in Washington, D.C., to speak with Bryan O?Connor, [Chief] of the Office of Safety and Mission Assurance [OSMA], for the NASA at 50 Oral History Project. ... And in the early eighties it was nice to see some of the Apollo and even Gemini and Mercury people that were still there and talk to them about their history and the culture of NASA. ... I think, in fact, things like this oral history project is a big piece of that. ...

Introduction to PLASMA ASTROPHYSICS (Selected 10 lectures) Boris V. Somov Astronomical Institute and Faculty of Physics Moscow State University Pushino-na-Oke, 2008 Contents Ab out These Lectures 1 Particles and Fields: Exact Self-Consistent Description 1.1 Liouville's theorem . . . . . . . . . . . . . . . . . . . 1.1.1 Continuity in phase space . . . . . . . . . 1.1.2 The character of particle interactions 1.1.3 The Lorentz force, gravity . . . . . . . . . 1.1.4 Collisional friction . . . . . . . . . . . .