26.
PASSAGE (Next 15 Questions)
Galileo used mathematical calculation as well as observation of nature and was the first astronomer to use a telescope. With an instrument of his own _____(26)_____ Galileo observed Jupiter and four of _____(27)_____ moons, the phases of Venus and the spots on the sun. His _____(28)_____ and calculations confirmed that Copernicus and Kepler were right. He saw _____(29)_____ his own eyes and made other people _____(30)_____ too that the earth was not the fixed center of _____(31)_____ universe as Ptolemy had said. Galileo _____(32)_____ made some important discoveries in mechanics. He did not _____(33)_____ drop cannon balls from the Leaning Tower of Pisa _____(34)_____ that all bodies fall at the _____(35)_____ speed, but he did roll balls _____(36)_____ a slope to show that the _____(37)_____ a body falls is proportionate _____(38)_____ the square of the time it takes to fall. Galileo also noticed the regular _____(39)_____ of the lamps in Pisa Cathedral; _____(40)_____ gave him the idea of the pendulum, a device that enabled him to make the clock a scientific instrument for the first time.
Which one of the following best suits the 26th blank?
