Results 151 to 160 of about 123,895 (209)

Planetary Surface Temperatures

1991
It is no news that the major source of heat energy in the solar system is the Sun. Its energy comes from nuclear reactions that take place at its core. The energy of a particular photon created in these reactions is absorbed and reradiated many times before reaching the surface, a process that takes on average about a million years.
W. Schlosser, T. Schmidt-Kaler, E. F. Milone   +2 more
openaire   +1 more source

Planetary Surface Processes

2011
Planetary Surface Processes is the first advanced textbook to cover the full range of geologic processes that shape the surfaces of planetary-scale bodies. Using a modern, quantitative approach, this book reconsiders geologic processes outside the traditional terrestrial context.
openaire   +1 more source

Chemical Mapping of Planetary Surfaces

IEEE Transactions on Geoscience Electronics, 1976
Two instruments, the gamma-ray spectrometer and the X-ray fluorescence spectrometer, are uniquely suited to the chemical mapping of planetary surfaces from orbit. Through their detection of characteristic line spectra they measure the concentrations of a suite of elements in each area overflown.
E. L. Haines, J. R. Arnold, A. E. Metzger   +2 more
openaire   +1 more source

Robotic Planetary Surface Exploration

IFAC Proceedings Volumes, 1998
Abstract This is a brief text of speech given by the author as the opening plenary talk at the 3rd IFAC Symposium on Intelligent Autonomous Vehicles. Mter a brief introduction about JPL's past, present, and future missions, it presents Sojourner rover and its accomplishments as well as JPL's research on Long Range Science Rovers. References 1, 2, and
openaire   +1 more source

Reconfigurability in planetary surface vehicles

Acta Astronautica, 2009
Abstract Traditionally, space systems have been built for fixed requirements and optimized for highest performance. Future systems for human exploration of Moon and Mars, however, require focus on new architectural strategies geared towards increased affordability and survivability in addition to performance.
Afreen Siddiqi, Olivier L. de Weck
openaire   +1 more source

Humanoids for lunar and planetary surface operations

5th IEEE-RAS International Conference on Humanoid Robots, 2005., 2006
This paper presents a vision of humanoid robots as human's key partners in future space exploration, in particular for construction, maintenance/repair and operation of lunar/planetary habitats, bases and settlements. It integrates this vision with the recent plans for human and robotic exploration, aligning a set of milestones for operational ...
A. Stoica, D. Keymeulen, A. Csaszar, null Quan Gan, T. Hidalgo, J. Moore, J. Newton, S. Sandoval, null Jiajing Xu   +8 more
openaire   +1 more source

Planetary Core and Surface Temperatures

SSRN Electronic Journal, 2013
The paper explains why the physics involved in atmospheric and sub-surface heat transfer appears to have been misunderstood, and incorrectly applied, when postulating that a radiative “greenhouse effect” is responsible for warming the surfaces of planets such as Venus and our own Earth.A detailed discussion of the application of the Second Law of ...
openaire   +1 more source

Photopolarimetric sensing of planetary surfaces

Advances in Space Research, 1985
Abstract Polarization measurements over the surfaces of the Moon, Mercury, Mars and Saturn's rings, and global data for the Galilean satellites, have been recorded with telescopes in France. A number of asteroids were measured by B. Zellner in USA. The curves of polarization are diagnostic of the micro-texture of the surface, and demonstrate that all
openaire   +1 more source

Mapping of planetary surfaces by radar

Proceedings of the IEEE, 1973
A review is presented of the several methods which are available for the mapping of both reflectivity and topography of planetary surfaces by ground-based radar. Emphasis is placed on observational methods rather than interpretation of results. The various observational schemes are illustrated by recent observational results.
T. Hagfors, D.B. Campbell
openaire   +1 more source

Mobility on Planetary Surfaces

2012
Exploration vehicles, either manned or automatic, can use a variety of means of locomotion to achieve their goal. A first distinction must be made between ground vehicles, i.e. vehicles supported by a solid surface, atmospheric or sea vehicles, i.e.
openaire   +1 more source