Titlebook: Understanding Gaia; A Mission to Map the Gabriella Bernardi,Alberto Vecchiato Book 2019 Springer Nature Switzerland AG 2019 European Space

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gument”: if you have nothing to hide, you have nothing to fear. Besides, ensuring the security of the network itself is said to actually require a detailed analysis of network flows. Reasonable expectations of privacy should thus progressively disappear in cyberspace. While it is true that enforceme

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Gabriella Bernardi,Alberto Vecchiato5 Data Protection Directive (95/46/EC) established clear norms that have guided the development of data protection laws at the national level. However, these principles have often been tested by advances in the field of law enforcement, where personal data has increasingly been processed for the pur

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access control system is to enforce security policies by gating access to, and execution of, processes and services within a computing system. Specification and enforcement of permissions can be based on asymmetric cryptography. In order to employ asymmetric cryptography in open computing environmen

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History of Astronomy at a GlanceIn the two previous chapters, we learned about the astronomical targets of the measurements of Gaia. We also mentioned some of the scientific mysteries that scientists hope to solve with the help of this satellite, and stressed their importance for Astronomy and Astrophysics.

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AstrometrySo, Astrometry “just” deals with the mapping of the sky, whereas the “really interesting things” are investigated by the other, newer, and shinier branches that make up astronomy. But… is it really that simple?

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On the Trail of Gaia DataIn the next chapter, we are going to see that Gaia takes its measurements from the L2 point on the Earth-Sun system, a quiet location about 1.5 million km away from the Earth. Here, the satellite collects the precious data that, first of all, have to be sent to the Earth, where the so-called “ground segment” of the mission operates.

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Gabriella Bernardi,Alberto VecchiatoFirst comprehensive report on the European Space Agency’s Gaia mission for a general audience.Presents the scientific results available to date.Places the mission within its overall historical and sci