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Abstract.After the success of Deep Impact mission to hit the nucleus of Comet 9P/Tempel 1 with an impactor, the concerns are turned now to the possible reutilization of this dormant flyby spacecraft in the study of another comet, for only about 10% of the cost of the original mission. Comet 103P/Hartley 2 on UT 2010 October 11 is the most attractive target in terms of available fuel at rendezvous and arrival time at the comet. In addition, the comet has a low inclination so that major orbital plane changes in the spacecraft trajectory are unnecessary. In an effort to provide information concerning the planning of this new NASA EPOXI space mission of opportunity, we use in this work, visual magnitudes measurements available from International Comet Quarterly (ICQ) to obtain, applying the Semi-Empirical Method of Visual Magnitudes -SEMVM (de Almeida, Singh, & Huebner 1997), the water production rates (in molecules/s) related to its perihelion passage of 1997. When associated to the water vaporization theory of Delsemme (1982), these rates allowed the acquisition of the minimum dimension for the effective nuclear radius of the comet. The water production rates were then converted into gas production rates (in g/s) so that, with the help of the strong correlation between gas and dust found for 12 periodic comets and 3 non-period comets (Trevisan Sanzovo 2006), we obtained the dust loss rates (in g/s), its behavior with the heliocentric distance and the dust-to-gas ratios in this physically attractive rendezvous target-comet to Deep Impact spacecraft at a closest approach of 700 km.

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The Digital Information and Communication Technologies are instruments that can aid the process of teaching and learning of contents that are often abstract, such as the astronomical concepts that in many cases happen in a confusing way and are even excluded from the science syllabus, making the teaching of astronomy incoherent with the student reality. Thus, the present work had the objective of investigating, through a Systematic Review of Literature (RSL), which are the digital technologies that are being used for the teaching of astronomy in the school context and what are the main astronomical contents taught through these technologies. The RSL was the methodological approach adopted for this exploratory study, which had the search interval from 2000 to 2017, in the following databases: the Theses and Dissertations Bank of the Coordination of Improvement of Higher Level Personnel, the Digital Library Brazilian Journal of Theses and Dissertations, the annals of the National Symposium on Astronomy Education, the annals of the National Meeting of Research in Science Education, and the journals listed in the restricted index in the Teaching area of the Sucupira Platform. As results, of the 19.053 papers analyzed, only 33 addressed the thematic, being that the majority of them used the Softwares as a technological instrument to teach astronomical contents. In addition, the results showed that the content “Solar System” corresponds to the most taught through digital technologies in schools. Therefore, the results point that there are few researches that indicate the use of technological resources for the teaching of Astronomy.