by Max Fairbairn
The text covers principles of planetary photometry (radiance and the equation of transfer, diffuse reflection and transmission, reflectance functions, diffuse reflection and transmission, radiances of planetary spheres), albedo (scattering and absorption, single-scattering and normal albedo, net flux and exitance, hemispherical albedo, Gaussian triple integral algorithm), a brief history of the Lommel-Seeliger law.
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by Elbert A. King - Lunar and Planetary Institute
The excitement of the Apollo program was that it accomplished a bold leap from the surface of the Earth to the Moon. The deed challenged our technology and engineering skill. Preparations are being made now for another and even more daring leap.
A trans-Neptunian object is any minor planet in the Solar System that orbits the Sun at a greater average distance (semi-major axis) than Neptune. The Kuiper belt, scattered disk, and Oort cloud are conventional divisions of this volume of space.
The Solar System comprises the Sun and its planetary system, as well as a number of dwarf planets, satellites, and other objects that orbit the Sun. It formed 4.6 billion years ago from the gravitational collapse of a giant molecular cloud.
The pictures in this publication are a part of the rich harvest of information returned by Voyager 1. These images are of great beauty as well as great scientific interest, reminding us of the breathtaking dimensions of the solar system we inhabit.