Observational evidence of the complementary relationship in regional evaporation lends strong support for Bouchet's hypothesis

Observational Evidence of the Influence of the Qinghai-Xizang (Tibet) Plateau on the Occurrence of Heavy Rain and Severe Convective Storms in China.

Observational Evidence of the WHIM

Observational evidence on the stability of the hydro-glaciological regime of subglacial Lake Vostok

Observational evidences for the standard cosmological model.

Observational Evidences of Black Hole Universe

Observational limits on a millihertz stochastic background of gravitational radiation

Observational limits on companions to G29-38

Observational Methods, Constraints and Candidates

Observational physics of mirror world

Observational properties of compact groups of galaxies

Observational properties of Short GRBs in the Merger scenario

Observational relations in model universes dominated by domain-wall-like matter

Observational relationship of climatologic beta drift with large-scale environmental flows

Observational relationships in inflationary universes and other cosmologies

Observational Research on Star and Planetary System Formation

Observational search for early galaxies.

Observational Selection Effects in Europa Image Data: Identification of Chaotic Terrain

Observational Signature of Extended Gravity Theories

Observational Status of Microquasars in the Radio and Gamma-ray Domain