Results 51 to 60 of about 186,384 (251)
Evolution of Water Reservoirs on Mars: Constraints from Hydrogen Isotopes in Martian Meteorites [PDF]
, 2014 Martian surface morphology implies that Mars was once warm enough to maintain persistent liquid water on its surface. While the high D/H ratios (~6 times the Earth's ocean water) of the current martian atmosphere suggest that significant water has been lost from the surface during martian history, the timing, processes, and the amount of the water loss
arxiv +1 more source
Sulfur Cycling as a Viable Metabolism under Simulated Noachian/Hesperian Chemistries
Life, 2022 Water present on the surface of early Mars (>3.0 Ga) may have been habitable. Characterising analogue environments and investigating the aspects of their microbiome best suited for growth under simulated martian chemical conditions is key to ...
James A. W. Oliver +9 more
doaj +1 more source
Evidence for a Past Martian Ring from the Orbital Inclination of Deimos [PDF]
, 2020 We numerically explore the possibility that the large orbital inclination of the martian satellite Deimos originated in an orbital resonance with an ancient inner satellite of Mars more massive than Phobos. We find that Deimos's inclination can be reliably generated by outward evolution of a martian satellite that is about 20 times more massive than ...
arxiv +1 more source
Photovoltaics-Driven Power Production Can Support Human Exploration on Mars
Frontiers in Astronomy and Space Sciences, 2022 A central question surrounding possible human exploration of Mars is whether crewed missions can be supported by available technologies using in situ resources.
Anthony J. Abel +13 more
doaj +1 more source
Space Environmental Chamber for Planetary Studies
Sensors, 2020 We describe a versatile simulation chamber that operates under representative space conditions (pressures from < 10−5 mbar to ambient and temperatures from 163 to 423 K), the SpaceQ chamber.
Abhilash Vakkada Ramachandran +4 more
doaj +1 more source
Remote Sensing, 2022 The instruments of the Mars Reconnaissance Orbiter (MRO) provide a large quantity and variety of imagining data for investigations of the Martian surface.
Sergej Stepcenkov +2 more
doaj +1 more source
Martian meso/micro-scale winds and surface energy budget [PDF]
, 2011 Regional, diurnal and seasonal variations of surface temperature are particularly large on Mars. This is mostly due to the Martian surface remaining close to radiative equilibrium.
Forget, F. +6 more
core
Interactions of rare earth elements with living organisms and emerging biotechnical applications
PLANTS, PEOPLE, PLANET, EarlyView.Rare earth elements (REEs) are critical resources required to achieve net‐zero carbon emission targets and energy security. However, rising demand for REEs coupled with significant extraction and processing challenges and geopolitical risks restricts access to REE resources.
Samantha A. McGaughey +6 more
wiley +1 more source
Frontiers in Microbiology, 2022 Nitrate-dependent Fe2+ oxidation (NDFO) is a microbially mediated process observed in many anaerobic, low-nutrient (oligotrophic) neutral–alkaline environments on Earth, which describes oxidation of Fe2+ to Fe3+ in tandem with microbial nitrate reduction.
Alex Price +5 more
doaj +1 more source
Space Economy and Sustainability: A Systematic Review
Sustainable Development, EarlyView.ABSTRACT The space economy is booming thanks to the increasing investment of government agencies, private companies, and venture capitalists. From the beginning of the New Space era, the array of actors involved in the development of technologies for extra‐terrestrial activities has increased, as well as the downstream applications that foster ...
Marianna Valente +2 more
wiley +1 more source