Results 71 to 80 of about 80,597 (275)

Temporal analysis of all high-resolution Mars imaging products [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
A meta-data analysis has been performed of high-resolution imagery that have been acquired over the last four decades from Mars. More specifically, we are interested in two independent image parameters, the time that each image was acquired and the ...
P. Sidiropoulos, J.-P. Muller
doaj   +1 more source

Review for the Design and Experimental Study of a Coaxial Twin-rotor Mars Unmanned Aerial Vehicle

open access: yesSpace: Science & Technology
The thin atmosphere of Mars presents a necessary yet challenging flight environment for low-altitude flying vehicles or unmanned aerial vehicles. As a key technology, Martian unmanned aerial vehicles hold marked value and importance for scientific ...
Zhifang Ke   +10 more
doaj   +1 more source

CONCEPŢIA FILOSOFICĂ DESPRE STAT ŞI DREPT A LUI VASILE GOLDIŞ

open access: yesEIRP Proceedings, 2007
Being a part of a philosophic common conception, of an original way of interpretinggreat trends of the European history the judicial philosophy seen by Vasile Goldiş speaksabout values, principles and arguments which guided his entire political career ...
Martian Iovan
doaj  

Chalcophile Element Constraints on the Sulfur Content of the Martian Mantle [PDF]

open access: yes
The sulfur content of the Martian mantle is critical to understanding volcanic volatiles supplied to the surface of Mars and possibly climate. In the absence of Martian mantle rocks, sulfur content of the mantle has been inferred from S contents of ...
Hewins, R. H.   +5 more
core   +1 more source

Seasonal Ice Cover Could Allow Liquid Lakes to Persist in a Cold Mars Paleoclimate

open access: yesAGU Advances, Volume 7, Issue 1, February 2026.
Abstract Geomorphic and stratigraphic studies of Mars prove that extensive liquid water flowed and pooled on the surface early in Mars' history. Martian paleoclimate models, however, have difficulty simulating climate conditions warm enough to maintain liquid water on early Mars.
Eleanor L. Moreland   +8 more
wiley   +1 more source

Perchlorates on Mars enhance the bacteriocidal effects of UV light

open access: yesScientific Reports, 2017
Perchlorates have been identified on the surface of Mars. This has prompted speculation of what their influence would be on habitability. We show that when irradiated with a simulated Martian UV flux, perchlorates become bacteriocidal.
Jennifer Wadsworth, Charles S. Cockell
doaj   +1 more source

The ISSI international study team on the martian PBL – status report and plan [PDF]

open access: yes, 2008
Dynamical processes in the Martian boundary layer provide the means of communication between surface ice deposits and the free atmosphere, and the means of lifting dust from the surface.
Galperin, B.   +13 more
core  

Evaluating Investment in Space Programs: A Case for Theoretical Pluralism

open access: yesFinancial Accountability &Management, Volume 42, Issue 1, Page 19-35, February 2026.
ABSTRACT A perennial question repeatedly asked since the early Mercury (USA) and Salyut (then Soviet Union) space programs has been variations on the theme of “how can the cost of space exploration be justified?” This question—which in broad terms constitutes the research question considered in this paper—continues to be directed toward space agencies ...
Basil P. Tucker, Hank C. Alewine
wiley   +1 more source

Carbon reservoirs on Mars: Constraints from Martian meteorites [PDF]

open access: yes, 2003
We have measured the abundance and stable isotopic composition of magmatic carbon extracted from a suite of shergottites. The results confirm previous findings that primordial carbon on Mars is isotopically lighter than that of the ...
Grady, Monica, Wright, Ian
core  

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