Author name: Martin Horejsi

Dr. Martin Horejsi is a Professor of Instructional Technology and Science Education at The University of Montana, Missoula. A long-time meteorite collector and writer, before publishing his column "The Accretion Desk" in The Meteorite Times, he contributed often and wrote the column "From The Strewnfields" in Meteorite Magazine. Horejsi is also the Lead Technology Reviewer for The National Science Teaching Association, and just celebrated his 22th year working with NASA and the JPL in education and public outreach (EPO), and is a NASA Solar System Ambassador. Horejsi specializes in the collection and study of historic witnessed fall meteorites with the older, smaller, and rarer the better. Although his meteorite collection once numbered over a thousand pieces with near that many different locations, several large trades and sales and trades have streamlined the collection to about 250 important locations with all but 10 being witnessed falls. Many of the significant specimens in Horejsi's collection are historic witnessed falls that once occupied prominence in the meteorite collections of Robert A. Haag, James Schwade, and Michael Farmer. Other important specimens were acquired through institutional trades including those from The Smithsonian Institution, Arizona State University, and other universities. Horejsi was awarded the Harvey (Nininger) Award in Tucson in 2006, The Brotherhood of Guardians of the Ensisheim Meteorite in 2011, a JPL Inspiration Person, on the JPL STARDUST Team that was awarded the Smithsonian Air and Space Museum Annual Trophy in 2008, and former board member of the International Meteorite Collectors Association, and the Northwest Council for Computers in Education.

Witnessed Fall: Castalia, North Carolina, USA

A May 1874 Witnessed Fall: Castalia, North Carolina, USA Geologic Poetry from Space: Drink from the fountain of Castilia and be inspired to write meteorite verse.   Castalia fell to earth on May 14, 1874. Three pieces were collected totaling about 7.3kg with a majority of the material in one 5.5 kg individual.Being a xenolithic and brecciated H5 chondrite simply

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Witnessed Fall: Vernon County, Wisconsin, USA

An March 1865 Witnessed Fall: Vernon County, Wisconsin, USA Foreshadowed the Death of a President Posing with an faux antique scale cube, Vernon County rests patiently as it has in collections for almost 150 years. It is written that its fall attracted little attention, but today meteorite collectors worldwide covet such historic witnessed falls of small TKWs. For the fledgling

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Witnessed Fall: Krymka, Ukraine

An January 1946 Witnessed Fall: Krymka, Ukraine The Chondrite That Keeps on Giving Stretch your imagination and pretend the surface of Krymka is the view outside your spaceship as you jump to hyperdrive while cruising the early solar system. Let’s be honest, usually when we talk about a meteorite being gorgeous, beautiful, amazing, stunning, or magnificent, the average person might

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Nakhon Pathom, Thailand Breccia like you give a Damn.

An December 1923 Witnessed Fall: Nakhon Pathom, Thailand Breccia like you give a Damn. (*and an important TKW discrepancy)   Nothing shouts history like a good breccia. Not just earthly history, but 4.6 billion years of orbital adventures. At 9:00 o’clock in the evening on the winter solstice of 1923, the earth welcomed the fifth and final witnessed meteorite fall

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An November 1994 Witnessed Fall: New Halfa, Sudan

An November 1994 Witnessed Fall: New Halfa, Sudan 100 Grams is Large? I’m glad someone thought so.     In all its crusted glory, my “large” individual of New Halfa radiates dimpled darkness. I appreciate the unique form this specimen holds. Many individuals of this size prefer more of an ovalized form with smooth sides and muted corners. This stone,

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An September 1768 Witnessed Fall: Lucé, France

An September 1768 Witnessed Fall: Lucé, France The Conservation of Mass: Always here. But where? The law of conservation of mass states that the mass of a closed system will remain constant over time, regardless of the processes acting inside the system.   Every meteorite came after. None came before. Lucé, France is truly a treasure to behold. As the

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Cassini at Saturn: A Personal 32 Year Journey

In this installment of the Accretion Desk, I have put together some of the experiences I have collected over the years with the Cassini spacecraft. For me the upcoming four-year mission around Saturn only adds more enjoyment to my personal Saturn experience, one that began formally 32 years ago. Saturn has always been the planet of my dreams. Although the

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