It was Saturn.
Achaians are the other name the ancient Greeks are known by.
Neptune is the farthest planet from the sun. Pluto is no longer a planet since it is too small. It is known to be a dwarf planets (illegal planet).
Nothing. The ancient Greeks did not know Antarctica existed.
Neptune is the farthest planet, past Saturn and Uranus.
Hellenes
Jupiter was known as Zeus to the Greeks.
Ancient Greeks
From 1930 (when Pluto was discovered) to 1978, Pluto was the most distant planet. In 1978, Pluto slipped inside Neptune's orbit. Neptune was the farthest planet from 1978 to 1999, and Pluto (which has a fairly high eccentricity) was farther away from 1999 to 2006. In 2006, the International Astronomical Union "demoted" Pluto from Planet to Dwarf Planet, meaning that Neptune is once again the most distant planet.
What is now known as Venus.
The precise year is not known: the ancient Assyrians knew about it way back in the 14 century BC. It was then called something like "the Jumping Planet". It was known, by name, to ancient Astronomers from Chinese, Indian, Babylonian, Nordic, Islamic and Mayan cultures.
Romans are better known for their fountains because of their vast aqueduct system than were the Ancient Greeks.
Pluto is the tiniest planet in the solar system. It is the planet farthest from the Sun. The planet's color is blue. It is the coldest planet. Pluto is now known as a "dwarf planet."