[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: NWA xxx Contributed by: Steve Brittenham http://www.tucsonmeteorites.com/mpodmain.asp?DD=05/05/2017 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and 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] Geoscience meets the four horsemen?
Marriner, N., Morhange, C. and Skrimshire, S., 2010. Geoscience meets the four horsemen?: Tracking the rise of neocatastrophism. Global and Planetary Change, 74(1), pp.43-48. https://www.researchgate.net/profile/Christophe_Morhange/publication/222537265_Geoscience_meets_the_four_horsemen_Tracking_the_rise_of_neocatastrophism/links/09e4150b4acde179c400.pdf Yours, Paul H. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and 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] Dawn Observing Ceres; 3rd Reaction Wheel Malfunctions
https://www.jpl.nasa.gov/news/news.php?feature=6830 Dawn Observing Ceres; 3rd Reaction Wheel Malfunctions Jet Propulsion Laboratory Arpil 26, 2017 Mission Status Report NASA's Dawn spacecraft is preparing to observe Ceres on April 29 from an "opposition" position, directly between the dwarf planet's mysterious Occator Crater and the sun. This unique geometry may yield new insights about the bright material in the center of the crater. While preparing for this observation, one of Dawn's two remaining reaction wheels stopped functioning on April 23. By electrically changing the speed at which these gyroscope-like devices spin, Dawn controls its orientation in the zero-gravity, frictionless conditions of space. The team discovered the situation during a scheduled communications session on April 24, diagnosed the problem, and returned the spacecraft to its standard flight configuration, still with hydrazine control, on April 25. The failure occurred after Dawn completed its five-hour segment of ion thrusting on April 22 to adjust its orbit, but before the shorter maneuver scheduled for April 23-24. The orbit will still allow Dawn to perform its opposition measurements. The reaction wheel's malfunctioning will not significantly impact the rest of the extended mission at Ceres. Dawn completed its prime mission in June 2016, and is now in an extended mission. It has been studying Ceres for more than two years, and before that, the spacecraft orbited giant asteroid Vesta, sending back valuable data and images. Dawn launched in 2007. The Dawn operations team has been well prepared to deal with the loss of the reaction wheel. The spacecraft is outfitted with four reaction wheels. It experienced failures of one of the wheels in 2010, a year before it entered orbit around Vesta, and another in 2012, as it was completing its exploration of that fascinating world. (See issues with these devices). When a third reaction wheel stopped working this week, the spacecraft correctly responded by entering one of its safe modes and assigning control of its orientation to its hydrazine thrusters. Today, Dawn's elliptical orbit will bring it from an altitude of 17,300 miles (27,900 kilometers) to 15,800 miles (25,400 kilometers) above Ceres. The Dawn mission is managed by NASA's Jet Propulsion Laboratory in Pasadena, California, for NASA's Science Mission Directorate in Washington. Dawn is a project of the directorate's Discovery Program, managed by NASA's Marshall Space Flight Center in Huntsville, Alabama. UCLA is responsible for overall Dawn mission science. Orbital ATK Inc., in Dulles, Virginia, designed and built the spacecraft. The German Aerospace Center, Max Planck Institute for Solar System Research, Italian Space Agency and Italian National Astrophysical Institute are international partners on the mission team. For a complete list of mission participants, visit: https://dawn.jpl.nasa.gov/mission More information about Dawn is available at the following sites: https://www.nasa.gov/dawn https://dawn.jpl.nasa.gov News Media Contact Elizabeth Landau Jet Propulsion Laboratory, Pasadena, Calif. 818-354-6425 elizabeth.lan...@jpl.nasa.gov 2017-125 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and 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] Membrane Boxes, Jim Hartman
I have tried to order from Jim but my email cam back. Jim, Please email me directly with your current email address (And phone number, if possible) Anyone who knows Jim’s current email- I would like to have it. Thanks, all, Michael Blood __ Visit our Facebook page https://www.facebook.com/meteoritecentral and 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] 9 Top Meteorite Auctions Ending Sat & Sunday - 6 New Lunar 1 Old Lodranite and a little Allende
Hello everyone, I hope all are well. I have 4 auction ending Saturday: 0.48g Individual Lunar NWA 11228 ***ENDING SATURDAY MORNING*** http://www.ebay.com/itm/152529908267 0.8g Full Slice Lunar NWA 10447 ***ENDING SATURDAY MORNING*** http://www.ebay.com/itm/152529916270 4.5g Londranite fragment - NWA7474 ***ENDING SATURDAY MORNING*** http://www.ebay.com/itm/152529918972 1.9g Allende CV3 Fall fragment ***ENDING SATURDAY MORNING*** http://www.ebay.com/itm/152529921650 I have another 5 auctions ending Sunday: Lunar Feldspathic Breccia - NWA 11228 (Approved May 4th 2017) 7.1g Individual Lunar NWA 11228 ***ENDING SUNDAY MORNING*** http://www.ebay.com/itm/152531097251 4.6g Individual Lunar NWA 11228 ***ENDING SUNDAY MORNING*** http://www.ebay.com/itm//152531097255 2.3g Individual Lunar NWA 11228 ***ENDING SUNDAY MORNING*** http://www.ebay.com/itm/152531097250 1.6g Individual Lunar NWA 11228 ***ENDING SUNDAY MORNING*** http://www.ebay.com/itm/152531097256 1.0g Individual Lunar NWA 11228 ***ENDING SUNDAY MORNING*** http://www.ebay.com/itm/152531097245 Top Meteorite has over 200 specimens currently listed in our eBay store http://stores.ebay.com/topmeteorite or check out our website www.topmeteorite.com We also have specimens from the new Algerian lunar out for classification, please inquire if you have interest in complete individuals Thanks for your consideration, Dustin - Dustin Dickens Top Meteorite TopMeteorite.com dus...@topmeteorite.com US (+1) 928 821 0183 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and 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