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Search results for "direct evidence"

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Planetary Astronomy; an Appraisal of Ground-Based Opportunities  (1968)

Mars Sample Return: Issues and Recommendations  (1997)

Exploration of Near Earth Objects  (1998)

A Scientific Rationale for Mobility in Planetary Environments  (1999)

A Strategy for Research in Space Biology and Medicine in the New Century  (1998)

Neutrino Astrophysics: A Research Briefing  (1995)

A New Science Strategy for Space Astronomy and Astrophysics  (1997)

Post-Viking Biological Investigations of Mars  (1977)

The Explorer Program for Astronomy and Astrophysics  (1986)

Gravitation, Cosmology, and Cosmic-Ray Physics  (1986)

Biological Contamination of Mars: Issues and Recommendations  (1992)

Assessment of Programs in Space Biology and Medicine--1991  (1991)

Cosmology: A Research Briefing  (1995)

A Review of NASA's 'Atmospheric Effects of Stratospheric Aircraft' Project  (1999)

Strategy for the Detection and Study of Other Planetary Systems and Extrasolar Planetary Materials: 1990-2000  (1990)

Planetary and Lunar Exploration: Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 to 2015  (1988)

Working Papers: Astronomy and Astrophysics Panel Reports  (1991)

Geodesy in the Year 2000  (1990)

Scientific Uses of the Space Shuttle  (1974)