Results 31 to 40 of about 4,247,920 (343)

Factoring Origin of Life Hypotheses into the Search for Life in the Solar System and Beyond

open access: yesLife, 2020
Two widely-cited alternative hypotheses propose geological localities and biochemical mechanisms for life’s origins. The first states that chemical energy available in submarine hydrothermal vents supported the formation of organic compounds and ...
Alex Longo, Bruce Damer
doaj   +1 more source

Chelydra serpentina [PDF]

open access: yes, 1988
Number of Pages: 4Integrative BiologyEarth and Planetary ...
Ernst, Carl H.   +2 more
core   +1 more source

Fundamental Science and Engineering Questions in Planetary Cave Exploration

open access: yesJournal of Geophysical Research - Planets, 2022
Nearly half a century ago, two papers postulated the likelihood of lunar lava tube caves using mathematical models. Today, armed with an array of orbiting and fly‐by satellites and survey instrumentation, we have now acquired cave data across our solar ...
J. Wynne   +36 more
semanticscholar   +1 more source

Urspelerpes, U. brucei [PDF]

open access: yes, 2012
Number of Pages: 3Integrative BiologyEarth and Planetary ...
Camp, Carlos D.   +2 more
core   +1 more source

Micrurus fulvius [PDF]

open access: yes, 1983
Number of Pages: 4Integrative BiologyEarth and Planetary ...
Roze, Janis A., Tilger, Grace M.
core   +1 more source

Review of nuclear techniques for planetary science

open access: yes, 2020
Spaceflight instruments that measure the energy and intensity of gamma rays and neutrons emitted by the surfaces of planetary bodies have been included in planetary science missions since 1966.
A. M. Parsons
semanticscholar   +1 more source

An Approach to Science and Risk-Aware Planetary Rover Exploration

open access: yesIEEE Robotics and Automation Letters, 2022
This work grapples with the challenge of directing autonomous decision making by planetary rovers conducting science investigations. Most of the related work addresses obstacle avoidance and traversabilty, while less work seeks to directly improve ...
A. Candela, David S. Wettergreen
semanticscholar   +1 more source

Leptodactylus fallax [PDF]

open access: yes, 1994
Number of Pages: 3Integrative BiologyEarth and Planetary ...
Kaiser, Hinrich
core   +1 more source

Laser and radio tracking for planetary science missions—a comparison [PDF]

open access: yesJournal of Geodesy, 2018
At present, tracking data for planetary missions largely consists of radio observables: range-rate (Doppler), range and angular position (VLBI/$$\Delta $$ΔDOR). Future planetary missions may use Interplanetary Laser Ranging (ILR) as a tracking observable.
D. Dirkx   +6 more
semanticscholar   +1 more source

Incorporating Physical Knowledge Into Machine Learning for Planetary Space Physics

open access: yesFrontiers in Astronomy and Space Sciences, 2020
Recent improvements in data collection volume from planetary and space physics missions have allowed the application of novel data science techniques. The Cassini mission for example collected over 600 gigabytes of scientific data from 2004 to 2017. This
Abigail R. Azari   +3 more
doaj   +1 more source

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