Fill in the Blanks Across the UniverseOnline version Complete with the correct prepositions by Ximena Alzate Bustos 1 a to with from to as in of with with 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 .
New game