Completar Frases Across the UniverseVersión en línea Complete with the correct prepositions por Ximena Alzate Bustos 1 in with with of a with as to to from Space exploration designates the efforts of the human being to universe , its stars the scientific point of view and its economic exploitation . These efforts can involve both , human beings traveling spacecraft and satellites telemetry resources , or remote - guided probes sent other planets . Throughout history , they have recorded various celestial events , such solar and lunar eclipses , and made measurements of the stars and their orbits mainly the aim maintaining precise calendars . The two greatest astronomers of antiquity were Hipparchus of Nicaea and Ptolemy . These early astronomical observations were made entirely the naked eye and were therefore limited . The invention of the telescope gave great impetus the observation of the sky .
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