Results 51 to 60 of about 3,068 (209)

Three Worlds in One: Venus as a Natural Laboratory for the Effect of Rotation Period on Atmospheric Circulation

open access: yesThe Astrophysical Journal Letters
Because of its rotation period of 243 days, Venus is considered a slowly rotating planet. However, its persistent superrotating atmospheric jets, which increase in speed from surface to cloud tops, effectively set a faster rotation speed than the surface
Maureen Cohen   +4 more
doaj   +1 more source

Introducing the Conceptual Design Process of the Armita Lunar Rover Based on ECSS [PDF]

open access: yesفصلنامه علوم و فناوری فضایی
This study examines the structural design of planetary probes, introducing common configurations and methodologies. The research focuses on the system design process of the Armita lunar rover, developed for the first national probe robot competition ...
Amirhossain Adami   +7 more
doaj   +1 more source

Temperature effects on the infrared spectrum of molecules in planetary nebulae

open access: yes, 2016
In this work, we utilize a method based on Wang-Landau Monte Carlo sampling for studying the temperature effects of astrophysically relavant molecules. Anharmonic effects, e.g., resonances, overtones, and combination bands, are fully incoportated in this
Tao Chen   +5 more
core   +1 more source

Prized results from HARPS

open access: yesEPJ Web of Conferences, 2013
Searching for planets around stars with different masses probes the outcome of planetary formation for different initial conditions. The low-mass M dwarfs are also the most frequent stars in our Galaxy and potentially therefore, the most frequent planet ...
Perrier C.   +13 more
doaj   +1 more source

Combined Plasma and Laser Heating of Graphite

open access: yesPlasma
This paper investigates a novel combined laser and plasma heating test technique. Integrating the 1.5 kW Raycus RFL-C1500 laser source into the VGU-4 Inductively Coupled Plasma Facility (IPMech RAS) allowed the study of fine-grain MPG-7 graphite ablation
Aleksey Chaplygin   +8 more
doaj   +1 more source

Thermal control for planetary probes

open access: yes, 1974
Thermal control of planetary probes during the descent phase of a mission is examined. Emphasis was placed on the problems of atmospheric uncertainties to be encountered by the probes, insulation performance, and equipment temperature ...
Mcmordie, R.
core  

Planetary nebulae beyond the milky way - Historical overview [PDF]

open access: yes, 2006
Up to 10% of the total luminosity of a planetary nebula, ~500 L⊙, can be emitted in the dominant cooling line, [O iii] λ5007. This, coupled with the narrowness of the line (~15-25 km s-1), makes it extremely easy to detect PNe in external galaxies using ...
Barlow, MJ
core  

Mutual Impedance Probe in Collisionless Unmagnetized Plasmas With Suprathermal Electrons—Application to BepiColombo

open access: yesFrontiers in Astronomy and Space Sciences, 2019
Context: Mutual impedance experiments are active electric probes providing in-situ space plasma measurements. Such active experiments consist of a set of electric antennas used as transmitter(s) and receivers(s) through which various dielectric ...
Nicolas Gilet   +6 more
doaj   +1 more source

The Next Generation of Planetary Atmospheric Probes

open access: yes, 2005
Entry probes provide useful insights into the structures of planetary atmospheres, but give only one-dimensional pictures of complex four-dimensional systems that vary on all temporal and spatial scales. This makes the interpretation of the results quite
Houben, Howard
core  

Fast Double-Channel Aggregated Feature Transform for Matching Planetary Remote Sensing Images

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Matching planetary remote sensing images (PRSI) is essential for deep space exploration. Through matching optical images collected by different probes, the terrain of planets can be accurately mapped; however, PRSI lacks surface texture information and ...
Rong Huang   +6 more
doaj   +1 more source

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