Water world, glacier world, dust world

Article Abstract:

Simulations of planetary formation using computers provide insights into the conditions under which planets might form and help decide search priorities for future orbiting observatories like the Terrestrial Planet Finder. Physical characteristics of these terrestrial planets like, distance from primary (AU), eccentricity of orbit, mass, water content and water mass fraction, affect their climates and thus their overall habitability.

United States, Research and Development in the Physical, Engineering, and Life Sciences, Space Research and Technology, Astronomy, Natl Aeronautics & Space Admin, United States. National Aeronautics and Space Administration, Planet formation

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A mission to the Earth's core

Article Abstract:

An analysis of a proposal put forward by David Stevenson, a Professor of Planetary Science at CalTech, to mount a mission to explore the Earth's core. The technical difficulties involved in such a mission are detailed, as are possible solutions.

Discovery and exploration, Earth, Core (Geology), Stevenson, David

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