Хотя бы пару предложений из пассивного в активный залог,буду благодарна

1) many discoveries in astronomy and physics were made by him.2) telescopes to study space were built by him3)Galileo was sent to study medicine by his father4)chandelier was watched by him5)his first telescope was constructed by Galileo in 16096)The last years of gis life were spent by him in Florence.