Galileo was born on the 15 February, 1564 (15/2/1564).
1609- craters and mountains on the moon and the star clusters of the Milky Way.
1610's- spots and blemishes on the sun's surface
Galileo died on the 8 January, 1642 (8/1/1642). He lived for about 78 years in total.
Technologies used at the time
The only technology that he used was a telescope because it had only just been invented during the early 1600's. After he saw the telescope he worked on making his own.