No individual astronomer's names are known, the Venus tablet of Ammisaduqa, dated 1581 BC, shows that the Babylonians understood that the two were a single object.
Not necessarily. Though some appear as morning and evening 'stars'. Venus for example.
They are the same thing, which is the planet Venus.
Venus is the evening star
Venus is the morning star or the evening star, depending on where Venus is in its orbit.
the sun
Pythagoras
The object called at various times, the Morning Star and the Evening Star is the planet Venus.
it is both the morning star & evening star
The evening star is called Bearrasta
Pythagoras
Venus is called both the "Morning Star" and the "Evening Star".
Planet Venus is known as the morning star, and also as the evening star.