Explain the essential meaning of the second and third law to an interested non-scientific friend without making a mess.

Describe in some detail the important telescopic observations that Galileo about Venus. Why were these observations so important?

Giordano Bruno 1548—1600 was burned at the stake for heresy by the inquisition. Describe at least three of his astronomical speculations that led him to this horrible fate.

State clearly Kepler’s three laws. Explain the essential meaning of the second and third law to an interested non–scientific friend without making a mess.