who was the first to discover this system?
The ancient Sumerians.
Venus
 Nonetheless, a cylinder seal from the Jemdet Nasr period and the Venus tablet of Ammisaduqa from the First Babylonian dynasty indicate that the ancient Sumerians already knew that the morning and evening stars were the same celestial object. 
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.
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Venus [SEP] Early studies
Because the movements of Venus appear to be discontinuous (it disappears due to its proximity to the sun, for many days at a time, and then reappears on the other horizon), some cultures did not recognize Venus as single entity; instead, they assumed it to be two separate stars on each horizon: the morning and evening star. Nonetheless, a cylinder seal from the Jemdet Nasr period and the Venus tablet of Ammisaduqa from the First Babylonian dynasty indicate that the ancient Sumerians already knew that the morning and evening stars were the same celestial object. In the Old Babylonian period, the planet Venus was known as Ninsi'anna, and later as Dilbat.