On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he ...
Astronomy on MSN
Jan. 7, 1610: Galileo sees four moons of Jupiter
On Jan. 7, 1610, Galileo Galilei turned his self-built telescope, which he had recently made improvements to, towards Jupiter ...
Galileo used an inclined plane to determine the rate of acceleration due to Earth's gravity. In one experiment, he changed the pitch of the plane, but not its height.
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