Exploring the Trans-Neptunian Solar System by Committee on Planetary & Lunar Exploration

Author:Committee on Planetary & Lunar Exploration
Language: eng
Format: epub
Tags: Space and Aeronautics : Space Exploration and Development
Publisher: NATIONAL ACADEMY PRESS
Published: 1998-05-07T00:00:00+00:00

Pluto and Charon

Pluto remains the only planet not visited by a spacecraft. Nonetheless, some information is available from telescopic observations, including detailed studies of the 1985 to 1990 series of mutual eclipses and transits (“mutual events”), stellar occultations, radiometric measurements, near-infrared spectra, and ground-based and HST images (see Plate 2). These observations provide reasonably accurate estimates of size, albedo, system mass, surface composition, atmospheric pressure (upper limits) and composition, and surface temperature, as well as crude albedo maps.15

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