Furthering research, exploration, and the peaceful use of outer spacethrough international cooperation
Hajime Yano, Chair, SC B
Terms of Reference
The planetary bodies of the solar system (including the Earth), especially evolutionary, dynamic and structural aspects; planetary atmospheres are included insofar as these are essential attributes of their main body; smaller bodies, including satellites, planetary rings, asteroids, comets, meteorites, and cosmic dust. (Explanatory remarks: The studies of this Commission refer mainly to space studies, especially through the use of space vehicles. The aspects of planetary atmospheric studies to be emphasized are those which relate the atmosphere to the observed surface and the interior of the planet. Structural aspects include geodesy, the observation of planetary figures, where appropriate, and potential fields, including the gravity field.)
Last update of terms of reference 19 December 2012
This Sub-Commission covers all small bodies in both the Solar System and other planetary systems such as comets, asteroids, dwarf planets, Trans-Neptunian Objects, cosmic dust, meteoroids, meteors, meteorites, planetary rings, and irregular satellites as well as interstellar dust and interstellar asteroids/comets. Through theoretical, computational, observational, analytical, experimental and exploratory studies, the Sub-Commission explores such topics as sources and sinks, formations and evolutions, dynamics, distributions, physical and chemical properties, compositions and structures, mutual interactions, impact and other processes of these objects.
Last update of terms of reference July 2018
To develop links between various groups engaged in the field of space geodesy and geodynamics by various techniques, coordinate work of these groups, elaborate and propose projects implying international cooperation, follow their progress and report on their advancement and results.
For further details please visit the IAG page of Commission 1 on Reference Frames.
Last update of terms of reference 7 April 2014
Sub-commission B3 covers all aspects of lunar science and exploration. The Moon is a natural laboratory for multiple aspects of planetary science, including the origin and evolution of the Earth-Moon system, and is a focus of many current research activities. Current lunar research includes remote sensing and in-situ measurements of the lunar surface, laboratory analyses of lunar samples, and theoretical modelling of the Moon’s internal structure and evolution. These activities are supported by a growing number of recent, on-going, and planned space missions to the Moon, which will further enrich understanding of our closest celestial neighbour. The Moon is also likely to be a testbed for in-situ resource utilization (ISRU) activities, as well as an accessible platform that may facilitate further space exploration activities. Anyone interested in these and related topics is welcome to contribute to the activities of this sub-commission.
Last update of terms of reference: 20 March 2021
Terms of Reference: TBD
Last update of terms of reference: TBD
Vice-Chairs:Sandrine Guerlet (France), 2021 – 2024Alex Hayes (USA), 2021 – 2024*Anezina Solomonidou (Greece), 2022 – 2026
Sub-commission B6/E4 deals with Exoplanets detection, characterization and modelling.
The recent discoveries of nearly a thousand of extrasolar planetary systems have opened up a number of new questions about their properties, physical conditions along with a rethinking of the concepts of habitability and life. In this context, it is not obvious whether a planetary system like our own solar system is common or unusual in the Galaxy. Planets may form and orbit around stars of almost every kind. We have found many planets which we call exotic, i.e. very close to their parent star, in highly eccentric orbits, or around binary systems, in a word very different from planets in our solar system.
Recent observations have shown how diverse can be the physical conditions of planets, both in structure, with fluffy or very dense planets, and in the composition and atmospheric stratification. The key word is diversity.
Understanding the origin of such diversity is the goal of many of the new studies and current projects. Such activities may cover both scientific and technological aspects and could include:
Last update of terms of reference: 19 July 2018
* (after officer term) = second and final term in the office indicated