Observational Constraints on Europa's Surface Composition from Galileo NIMS Data

Observational constraints on interstellar dust models.

Observational Constraints on Ion Acceleration by Waves in Coronal Holes

Observational constraints on non-Lorentzian continuum effects in the near-infrared solar spectrum using ARM ARESE data.

Observational Constraints on Solar Nebula Models

Observational constraints on solar wind acceleration mechanisms

Observational constraints on the atmospheres of Uranus and Neptune from new measurements near 10 micrometers

Observational constraints on the composition of exoplanets

Observational constraints on the inter-binary stellar flare hypothesis for the gamma-ray bursts

Observational constraints on the rotational dynamics of Mars

Observational Data in Galactic Star-Forming Regions (Avedisova 1992)

Observational definition of the Venus mesopause: vertical structure, diurnal variation, and temporal instability

Observational detection of meteor-produced VLF electromagnetic radiation.

Observational Equivalence and Full Abstraction in the Symmetric Interaction Combinators

Observational estimation of the 'cold trap' dehydration in the tropical tropopause layer: The water vapor match

Observational evidence for a link between currents in the geotail and in the auroral ionosphere

Observational Evidence for a Third Body in AS Camelopardalis

Observational evidence for helium production in stars - The helium abundance of hot subdwarfs, central stars of planetary nebulae, very massive O-stars and OBN-stars

Observational evidence for intermediate-mass black holes: ultra-luminous X-ray sources

Observational evidence for non-equilibrium ionization in the solar corona