were any space crafts sent to observe this system?
Yes, "Venera 4".
Venera 4
Venera 4 ( meaning "Venera 4"), also designated 4V-1 No.310 was a probe in the Soviet Venera program for the exploration of Venus.
does venus rise in the east or west East. where does this planet stand in terms of planetary position? Second from the Sun. what colour is this planet? To the naked eye, Venus appears as a white point of light. how is climate like on this planet? It has the hottest surface of any planet in the Solar System. who was the first to discover this system? The ancient Sumerians. and what does it compose of? It contains sulfur.
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Venera 4 [SEP] Introduction
Venera 4 ( meaning "Venera 4"), also designated 4V-1 No.310 was a probe in the Soviet Venera program for the exploration of Venus. The probe comprised an entry probe, designed to enter the Venus atmosphere and parachute to the surface, and a carrier/flyby spacecraft, which carried the entry probe to Venus and served as a communications relay for the entry probe. In 1967, it was the first successful probe to perform in-place analysis of the environment of another planet. Venera 4 provided the first chemical analysis of the Venusian atmosphere, showing it to be primarily carbon dioxide with a few percents of nitrogen and below one percent of oxygen and water vapors.