O I and N2(+) emissions in polar auroras in daytime

O II (83.4 nm) Emission Observation by the Extreme Ultraviolet Sensor onboard the Sounding Rocket SS-520-2

O(1S) and O(1D) quantum yields from rocket measurements of electron densities and 557.7 and 630.0 NM emissions in the nocturnal F-region

O2(a1Δg, υ = 0) chemical loss coefficients determined from SABER sunset measurements

Obituary: Arthur Dodd Code (1923-2009)

Obituary: Bjarne Nilsen, 1947-2005

Obituary: Charles Latif Hyder, 1930-2004

Obituary: Clifford G. Toner (1959-2009)

Obituary: David Q. Wark, 1918-2002

Obituary: Dianne K. Prinz, 1938-2002

Obituary: Herbert Gursky, 1930-2006

Obituary: James Alfred Van Allen, 1914-2006

Obituary: Per E. Maltby, 1933-2006

Obituary: Thomas Robert Metcalf, 1961-2007

Obituary: Timothy Hawarden (1943-2009)

Obituary: Tor Hagfors, 1930-2007

Obituary: William A. Rense (1914-2008)

Obituary: William L. Kraushaar, 1920-2008

Objectives of a prospective Ukrainian orbiter mission to the moon

Oblique modulation of electrostatic modes and envelope excitations in pair-ion and electron-positron plasmas