Context. Until recently, camera networks designed for monitoring fireballs worldwide were not fully automated, implying that in case of a meteorite fall, the recovery campaign was rarely immediate. This was an important limiting factor as the most fragile – hence precious – meteorites must be recovered rapidly to avoid their alteration. Aims. The Fireball Recovery and InterPlanetary Observation Network (FRIPON) scientific project was designed to overcome this limitation. This network comprises a fully automated camera and radio network deployed over a significant fraction of western Europe and a small fraction of Canada. As of today, it consists of 150 cameras and 25 European radio receivers and covers an area of about 1.5 × 106 km2. Methods. The FRIPON network, fully operational since 2018, has been monitoring meteoroid entries since 2016, thereby allowing the characterization of their dynamical and physical properties. In addition, the level of automation of the network makes it possible to trigger a meteorite recovery campaign only a few hours after it reaches the surface of the Earth. Recovery campaigns are only organized for meteorites with final masses estimated of at least 500 g, which is about one event per year in France. No recovery campaign is organized in the case of smaller final masses on the order of 50 to 100 g, which happens about three times a year; instead, the information is delivered to the local media so that it can reach the inhabitants living in the vicinity of the fall. Results. Nearly 4000 meteoroids have been detected so far and characterized by FRIPON. The distribution of their orbits appears to be bimodal, with a cometary population and a main belt population. Sporadic meteors amount to about 55% of all meteors. A first estimate of the absolute meteoroid flux (mag < –5; meteoroid size ≥~1 cm) amounts to 1250/yr/106 km2. This value is compatible with previous estimates. Finally, the first meteorite was recovered in Italy (Cavezzo, January 2020) thanks to the PRISMA network, a component of the FRIPON science project.

Two meteorite pieces have been recovered in Italy, near the town of Cavezzo (Modena), on 4th January 2020. The associated fireball was observed on the evening of New Year’s Day 2020 by eight all-sky cameras of the PRISMA fireball network, a partner of FRIPON. The computed trajectory had an inclination angle of approximately 68○ and a velocity at infinity of 12.8 km s−1. Together with the relatively low terminal height, estimated as 21.5 km, those values were indicating the significant possibility of a meteorite dropping event, as additionally confirmed by the non zero residual total mass. The strewn-field was computed taking into account the presence of two bright light flashes, revealing that the meteoroid had been very likely subject to fragmentation. Three days after the event, two samples, weighing 3.1 g and 52.2 g, were collected as a result of a dedicated field search and thanks to the involvement of the local people. The two pieces were immediately recognised as freshly fallen fragments of meteorite. The computed orbital elements, compared with the ones of known Near-Earth Asteroids from the NEODyS database, are compatible with one asteroid only; 2013 VC10. The estimated original mass of the meteoroid, 3.5 kg, and size, approximately 13 cm, is so far the smallest among the current 35 cases in which meteorites were recovered from precise strewn-field computation thanks to observational data. This result demonstrates the effectiveness of accurate processing of fireball network data even on challenging events generated by small size meteoroids.

A noção e a dimensão espacial, nas pesquisas e no ensino, são objetos de análise em diferentes áreas do conhecimento. Neste artigo, colocamos em discussão as relações entre princípios, conceitos e categorias, para afirmar o espaço como corpus que sustenta a análise espacial pelo viés geográfico. Construímos argumentos que propõem esses processos como enlaces com as temáticas propostas nas aulas e, também, como possibilidade prospectiva e criativa. Metodologicamente, o texto, organizado em três partes que focam essas noções, é configurado como estudo bibliográfico resultante de pesquisas teóricas que dialogam com nossas vivências de professoras. A investigação permite inferir, conjugando o natural e o social, que os princípios são leis elaboradas, os conceitos são generalizações e as categorias são modos de abordar. São possibilidades de realização da análise espacial, assumida pela arguição envolvendo a singularidade e a associação entre essas noções, e essas sistematizações são possibilidades à imaginação criadora.

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A partir das mudanças curriculares que vêm sendo implementadas no país, oriundas das redefinições das políticas educacionais, vive-se um processo que leva os professores a construírem distintas interpretações sobre o planejamento e o currículo escolar. Tomando a formação continuada de professores no oeste catarinense como referência, o objetivo é debater significações dos professores frente às novas políticas que reverberam na redefinição do currículo escolar. A questão investigada é: de que modo os professores do oeste catarinense têm compreendido sua participação nas redefinições curriculares? O ensaio tem um caráter crítico-reflexivo considerando a perspectiva participativa como basilar para o debate que se constrói na relação com a pesquisa empírica, realizada com um grupo de professores pedagogos que atuam em distintos municípios que compõem a região da Associação dos Municípios do Oeste de Santa Catarina (AMOSC). A análise dos dados é realizada por meio da pesquisa indiciária, tendo como principais resultados a percepção dos professores de que a redefinição curricular possibilita repensar sua atuação, construir autonomia, estabelecer diálogos, repensar planejamentos. No entanto, apesar da participação na elaboração do Referencial Curricular Regional, cabe ainda fortalecer a compreensão e a utilização efetiva do documento, bem como, sua articulação com aspectos direcionados pela BNCC.