Dank je beste firefly3quote:
Langzamerhand krijgt Opportunity toch ouderdoms verschijnselenquote:Opportunity Gets To Work On Interesting Rock
by Staff Writers
Pasadena CA (JPL) Nov 30, 2012
Opportunity, after completing the local area survey around the location called "Matijevic Hill" (named in honor of Jake Matijevic) at the inboard edge of Cape York on the rim of Endeavour Crater, has started conducting an in-situ (contact) science campaign on some high-value surface targets.
On Sol 3137 (Nov. 19, 2012), Opportunity began her in-situ investigation on the surface target, called "Sandcherry" with a Microscopic Imager (MI) mosaic, followed by the placement of the Alpha Particle X-ray Spectrometer (APXS).
The plan on Sol 3139 (Nov. 22, 2012), was the use the Rock Abrasion Tool (RAT) to brush the target. However, the robotic arm experienced a stall in the shoulder elevation joint and stopped all further robotic arm activity.
The sequenced APXS measurement on Sol 3140 (Nov. 23, 2012), then fortuitously became an atmospheric argon measurement. The joint stall had been experienced before with Opportunity when slow moves are commanded as in this instance.
However, the engineering team did review all the associated telemetry and found no indication of any change in the health of the joint.
As a further step, a diagnostic move was included at the start of the plan on Sol 3144 (Nov. 27, 2012). That diagnostic showed a nominally functioning joint.
The subsequent activity on Sol 3144 (Nov. 27, 2012), included a successful RAT brushing of the target followed by a MI mosaic and placement of the APXS.
Also, over the last several sols, the rover has been collecting an extensive color panorama (Pancam), called the "Matijevic pan."
As of Sol 3145 (Nov. 28, 2012), the solar array energy production was 559 watt-hours with an atmospheric opacity (Tau) of 0.793 and a solar array dust factor of 0.608.
Total odometry is 22.01 miles (35,429.63 meters).
Lees dit topic erg graag, bedankt voor je inzet!quote:Op woensdag 5 december 2012 08:08 schreef ExperimentalFrentalMental het volgende:
Chinezen willen groenten telen op Mars en maan
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Chinese astronauten willen op de maan en op Mars hun eigen groenten telen, zodat ze tijdens hun verblijf daar de beschikking hebben over verse producten. Een experiment in de hoofdstad Peking is geslaagd, melden Chinese media vandaag. Groenten werden geteeld onder omstandigheden die met die op de maan en op Mars vergelijkbaar zijn.
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Vier groenten werden geteeld in een ecologisch levensondersteunend systeem, een cabine van 300 kubieke meter. Het systeem berust op planten en algen. Om welke groenten het gaat, wordt niet gemeld. De deelnemers aan het experiment konden verse groenten voor maaltijden oogsten, aldus onderzoeker Deng Yibing tegen het persbureau Xinhua. Het is volgens hem het eerste experiment van deze aard in China.
quote:An international research team led by the Planetary Science Institute has found evidence that indicates that approximately 2 billion years ago enormous volumes of catastrophic floods discharges may have been captured by extensive systems of caverns on Mars, said PSI Research Scientist, J. Alexis Palmero Rodriguez.
Rodriguez and the research team came to this conclusion after studying the terminal regions of the Hebrus Valles, an outflow channel that extends approximately 250 kilometers downstream from two zones of surface collapse.
The Martian outflow channels comprise some of the largest known channels in the solar system.
Although it has been proposed their discharge history may have once led to the formation of oceans, the ultimate fate and nature of the fluid discharges has remained a mystery for more than 40 years, and their excavation has been attributed to surface erosion by glaciers, debris flows, catastrophic floodwaters, and perhaps even lava flows, Rodriguez said.
The PSI-led teams' work documents the geomorphology of Hebrus Valles, a Martian terrain that is unique in that it preserves pristine landforms located at the terminal reaches of a Martian outflow channel. These generally appear highly resurfaced, or buried, at other locations in the planet.
Rodriguez and his co-authors propose in an article titled "Infiltration of Martian overflow channel floodwaters into lowland cavernous systems" published in Geophysical Research Letters that large volumes of catastrophic floodwaters, which participated in the excavation of Hebrus Valles, may have encountered their ultimate fate in vast cavernous systems.
They hypothesize that evacuated subsurface space during mud volcanism was an important process in cavern development. Mud volcanism can expel vast volumes of subsurface volatiles and sediments to the surface.
But because evacuation of subsurface materials generally occurs within unconsolidated sediments resulting caverns are transient and mechanically highly unstable.
However, the investigated Martian caverns appear to have developed within permafrost, which at -65 degrees Celsius (-85 degree Fahrenheit) - a typical mean annual surface temperature for the investigated latitudes - has a mechanical strength similar to that of limestone. Limestone rocks host most of the terrestrial cavern systems.
Possible cavern have been recently identified on Mars and their existence has caught much scientific and public attention because of their potential as exobiological habitats. However, their age and dimensions remain uncertain.
The discovery of vast caverns that existed in ancient periods of Mars shows that these habitats may have in fact existed during billions of years of the planet's history, Rodriguez said.
PSI Senior Scientist Mary Bourke and Research Scientist Daniel C. Berman are co-authors on the paper.
Een mens kan ter plaatse een beslissing nemen.quote:
Ja maar dat geld kan beter gebruikt worden om meer onderzoek te doen naar planeten & manen waar we nog niet veel van weten, Neptunus of Europa bijvoorbeeld.quote:
En werkzaamheden waar de rover maanden over doet, kan een mens in anderhalf uur doen, bij wijze van spreken. Maar je moet wel een hoop extra rommel meenemen, dat is de keerzijde.quote:
New Horizons is op weg naar Pluto, da's toch watquote:
We zijn er bijna...quote: