[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Sacramento Mountains Contributed by: Anne Black http://www.tucsonmeteorites.com/mpodmain.asp __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Edinburgh
Would any meteorite aficionados living in Edinburgh, Scotland like to join me for a coffee around 8:30am or a pint late afternoon tomorrow? Best, Mendy Ouzillou __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Edinburgh
Would love to Mendy but it's a four hour drive for me and however charming your company is i'm afraid driving eight hours for a brew isn't going to happen! No offence! :-) Let me know if you are ever in Manchester :-) Cheers Martin On 26 August 2014 19:07, Mendy.Ouzillou via Meteorite-list meteorite-list@meteoritecentral.com wrote: Would any meteorite aficionados living in Edinburgh, Scotland like to join me for a coffee around 8:30am or a pint late afternoon tomorrow? Best, Mendy Ouzillou __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list -- Martin Goff www.msg-meteorites.co.uk IMCA #3387 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Edinburgh
No offense taken. With my new job, it may be possible in the future. :-) Mendy Ouzillou On Aug 26, 2014, at 8:14 PM, Martin Goff msgmeteori...@gmail.com wrote: Would love to Mendy but it's a four hour drive for me and however charming your company is i'm afraid driving eight hours for a brew isn't going to happen! No offence! :-) Let me know if you are ever in Manchester :-) Cheers Martin On 26 August 2014 19:07, Mendy.Ouzillou via Meteorite-list meteorite-list@meteoritecentral.com wrote: Would any meteorite aficionados living in Edinburgh, Scotland like to join me for a coffee around 8:30am or a pint late afternoon tomorrow? Best, Mendy Ouzillou __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list -- Martin Goff www.msg-meteorites.co.uk IMCA #3387 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Edinburgh
Will look forward to it :-) That goes out to any one else too who happens to be in or around Manchester on a UK visit, give me a shout and lets hook up and talk space rocks :-) Cheers Martin On 26 August 2014 19:19, Mendy.Ouzillou mendy.ouzil...@gmail.com wrote: No offense taken. With my new job, it may be possible in the future. :-) Mendy Ouzillou On Aug 26, 2014, at 8:14 PM, Martin Goff msgmeteori...@gmail.com wrote: Would love to Mendy but it's a four hour drive for me and however charming your company is i'm afraid driving eight hours for a brew isn't going to happen! No offence! :-) Let me know if you are ever in Manchester :-) Cheers Martin On 26 August 2014 19:07, Mendy.Ouzillou via Meteorite-list meteorite-list@meteoritecentral.com wrote: Would any meteorite aficionados living in Edinburgh, Scotland like to join me for a coffee around 8:30am or a pint late afternoon tomorrow? Best, Mendy Ouzillou __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list -- Martin Goff www.msg-meteorites.co.uk IMCA #3387 -- Martin Goff www.msg-meteorites.co.uk IMCA #3387 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Rosetta: Landing Site Search Narrows
http://www.jpl.nasa.gov/news/news.php?release=2014-289 Rosetta: Landing Site Search Narrows Jet Propulsion Laboratory August 25, 2014 The European Space Agency's Rosetta mission has chosen five candidate landing sites on comet 67P/Churyumov-Gerasimenko for its Philae lander. Philae's descent to the comet's nucleus, scheduled for this November, will be the first such landing ever attempted. Rosetta is an international mission spearheaded by the European Space Agency with support and instruments provided by NASA. Choosing the right landing site is a complex process. It must balance the technical needs of the orbiter and lander during all phases of the separation, descent and landing, and during operations on the surface, with the scientific requirements of the 10 instruments on board Philae. A key issue is that uncertainties in navigating the orbiter close to the comet mean that it is possible to specify any given landing zone only in terms of an ellipse - covering up to six-tenths of a square mile (one square kilometer) - within which Philae might land. This is the first time landing sites on a comet have been considered, said Stephan Ulamec, Philae Lander Manager at the German Aerospace Center, Cologne, Germany. The candidate sites that we want to follow up for further analysis are thought to be technically feasible on the basis of a preliminary analysis of flight dynamics and other key issues - for example, they all provide at least six hours of daylight per comet rotation and offer some flat terrain. Of course, every site has the potential for unique scientific discoveries. For each possible zone, important questions must be asked: Will the lander be able to maintain regular communications with Rosetta? How common are surface hazards such as large boulders, deep crevasses or steep slopes? Is there sufficient illumination for scientific operations and enough sunlight to recharge the lander's batteries beyond its initial 64-hour lifetime without causing overheating? The potential landing sites were assigned a letter from an original pre-selection of 10 possible sites, which does not signify any ranking. Three sites (B, I and J) are located on the smaller of the two lobes of the comet and two sites (A and C) are located on the larger lobe. The process of selecting a landing site is extremely complex and dynamic; as we get closer to the comet, we will see more and more details, which will influence the final decision on where and when we can land, said Fred Jansen, Rosetta's mission manager from the European Space Agency's Science and Technology Centre in Noordwijk, The Netherlands. We had to complete our preliminary analysis on candidate sites very quickly after arriving at the comet, and now we have just a few more weeks to determine the primary site. The clock is ticking and we now have to meet the challenge to pick the best possible landing site. The next step in preparation for landing operations is a comprehensive analysis of each of the candidate sites, to determine possible orbital and operational strategies that could be used for Rosetta to deliver the lander to any of them. At the same time, Rosetta will move to within 31 miles (50 kilometers) of the comet, allowing a more detailed study of the proposed landing sites. By September 14, the five candidate sites will have been assessed and ranked, leading to the selection of a primary landing site. A fully detailed strategy for the landing operations at the selected site will be developed, along with a backup. The landing of Philae is expected to take place in mid-November when the comet is about 280 million miles (450 million kilometers) from the sun. This will be before activity on the comet reaches levels that might jeopardize the safe and accurate deployment of Philae to the comet's surface, and before surface material is modified by this cometary activity. Launched in March 2004, Rosetta was reactivated in January 2014 after a record 957 days in hibernation. Composed of an orbiter and lander, Rosetta's objectives since arriving at comet 67P/Churyumov-Gerasimenko earlier this month are to study the celestial object up close in unprecedented detail, prepare for landing a probe on the comet's nucleus in November, and track its changes through 2015, as it sweeps past the sun. Comets are time capsules containing primitive material left over from the epoch when the sun and its planets formed. Rosetta's lander will obtain the first images taken from a comet's surface and will provide comprehensive analysis of the comet's possible primordial composition by drilling into the surface. Rosetta also will be the first spacecraft to witness at close proximity how a comet changes as it is subjected to the increasing intensity of the sun's radiation. Observations will help scientists learn more about the origin and evolution of our solar system and the role comets may have played in seeding Earth with water, and perhaps even life. The scientific
[meteorite-list] Mars Rover Opportunity Update: August 13-19, 2014
http://mars.jpl.nasa.gov/mer/mission/status.html#opportunity OPPORTUNITY UPDATE: Rover Suffers a Series of Resets This Week - sols 3752-3758, August 13, 2014-August 19, 2014: Opportunity is moving south along the west rim of Endeavour Crater heading towards 'Marathon Valley,' a putative location for abundant clay minerals. More recently, the incidence of Flash memory-induced resets has increased. The rover experienced resets on Sols 3754, 3757 and 3758 (Aug. 15, 18, and 19, 2014), which stops the onboard master sequence. Because of the project's vigilance and timely actions, the impact of the resets on rover science and exploration has been minimized. But the increase reset rate is compelling expedited corrective action to the Flash memory issue. On Sol 3752 (Aug. 13, 2014), Opportunity bumped just a few feet (over a meter) to a surface target, called 'Mt. Edgecumbe.' On the next sol, the robotic arm was used to collect a Microscopic Imager mosaic of the target, and then placed the Alpha Particle X-ray Spectrometer (APXS) on the same for multi-sol integration. The reset on Sol 3754 (Aug. 15, 2014) cut short the integration to a single sol. On Sol 3757 (Aug. 18, 2014), another reset occurred, but real-time action from mission controllers reactivated the rover's sequence and Opportunity was able to complete the planned drive, achieving about 157 feet (48 meters). Another reset happened on Sol 3758 (Aug. 19, 2014), suspending the remote sensing observation on that sol. The plan ahead to resume rover activities, including driving, until the reset problem can be corrected. As of Sol 3758 (Aug. 19, 2014), the solar array energy production was 692 watt-hours with an atmospheric opacity (Tau) of 0.888 and a solar array dust factor of 0.788. Total odometry is 25.28 miles (40.69 kilometers). __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
