Question: Which student of Plato was a traditional astrologer?

Context paragraphs:
Aristotle: Aristotle ( ; Greek: Ἀριστοτέλης , , "Aristotélēs"; 384–322 BC) was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidice, on the northern periphery of Classical Greece.  His father, Nicomachus, died when Aristotle was a child, whereafter Proxenus of Atarneus became his guardian.  At seventeen or eighteen years of age, he joined Plato's Academy in Athens and remained there until the age of thirty-seven (c. 347 BC).  His writings cover many subjects – including physics, biology, zoology, metaphysics, logic, ethics, aesthetics, poetry, theater, music, rhetoric, linguistics, politics and government – and constitute the first comprehensive system of Western philosophy.  Shortly after Plato died, Aristotle left Athens and, at the request of Philip II of Macedon, tutored Alexander the Great beginning in 343 BC.

Steve Lu: Steve Lu or Lu Xingfu (Chinese: 陆行夫 ; Born November 13, 1919) was a student of Zhang Daqian and Pu Ru.  Lu was trained in Chinese traditional art and calligraphy, collectively known as "guohua" or "traditional painting".  His additional formal training in Western art allowed him to create both impressionistic and expressionistic forms.  He has been at ease with both classical and experimental styles and combined both Chinese and Western methods.  Lu is also known as a seal carver, an author, an art historian, Fengshui practitioner, astrologer, and geomancer.  Lu has produced numerous works of modern and traditional Chinese art as he migrated from China to Taiwan to Singapore, where he now resides.

TUTOR (programming language): TUTOR (also known as PLATO Author Language) is a programming language developed for use on the PLATO system at the University of Illinois at Urbana-Champaign around 1965.  TUTOR was initially designed by Paul Tenczar for use in computer assisted instruction (CAI) and computer managed instruction (CMI) (in computer programs called "lessons") and has many features for that purpose.  For example, TUTOR has powerful answer-parsing and answer-judging commands, graphics, and features to simplify handling student records and statistics by instructors.  TUTOR's flexibility, in combination with PLATO's computational power (running on what was considered a supercomputer in 1972), also made it suitable for the creation of many non-educational lessons—that is, "games"—including flight simulators, war games, dungeon style multiplayer role-playing games, card games, word games, and medical lesson games such as Bugs and Drugs (BND).

John Frawley (astrologer): John Frawley (born 16 May 1955 in London, England) is a traditional astrologer, writer and educator, who has been noted for practicality and directness of approach, a depth of scholarship, and a provocative, challenging and witty style.

Platonic realism: Platonic realism is a philosophical term usually used to refer to the idea of realism regarding the existence of universals or abstract objects after the Greek philosopher Plato (c. 427–c. 347 BC), a student of Socrates.  As universals were considered by Plato to be ideal forms, this stance is ambiguously also called Platonic idealism.  This should not be confused with idealism as presented by philosophers such as George Berkeley: as Platonic abstractions are not spatial, temporal, or mental, they are not compatible with the later idealism's emphasis on mental existence.  Plato's Forms include numbers and geometrical figures, making them a theory of mathematical realism; they also include the Form of the Good, making them in addition a theory of ethical realism.

Olympiodorus the Younger: Olympiodorus the Younger (Greek: Ὀλυμπιόδωρος ὁ Νεώτερος ; c. 495 – 570) was a Neoplatonist philosopher, astrologer and teacher who lived in the early years of the Byzantine Empire, after Justinian's Decree of 529 AD which closed Plato's Academy in Athens and other pagan schools.  Olympiodorus was the last pagan to maintain the Platonist tradition in Alexandria (see Alexandrian School); after his death the School passed into the hands of Christian Aristotelians, and was eventually moved to Constantinople.

Marsilio Ficino: Marsilio Ficino (] ; Latin name: "Marsilius Ficinus"; 19 October 1433 – 1 October 1499) was an Italian scholar and Catholic priest who was one of the most influential humanist philosophers of the early Italian Renaissance.  He was an astrologer, a reviver of Neoplatonism in touch with every major academic thinker and writer of his day and the first translator of Plato's complete extant works into Latin.  His Florentine Academy, an attempt to revive Plato's Academy, influenced the direction and tenor of the Italian Renaissance and the development of European philosophy.

Luminary (astrology): The luminaries were what traditional astrologers called the two astrological "planets" which were the brightest and most important objects in the heavens, that is, the Sun and the Moon.  Luminary means, source of light.  The sun and moon, being the most abundant sources of light to the inhabitants of Earth are known as luminaries.  The astrological significance warrants the classification of the Sun and Moon separately from the planets, in that the Sun and Moon have to do with Man's spiritual consciousness, while the planetary influences operate through the physical mechanism.  The Moon is a luminary in the biblical sense that it affords to Man "light by night".  Some early, Pre-Newtonian astronomers to observe and study luminaries include Pythagoras, Aristotle, Claudius Ptolemy, al-Khwarizmi, Nicolaus Copernicus, Tycho Brahe, Galileo Galilei, and Johannes Kepler.

Olivia Barclay: Olivia Barclay (12 December 1919 in Essex – 1 April 2001 in Kent) was a British astrologer who played an important role in the revival of traditional forms of astrology in the late 20th century.  Much of her focus in the latter part of her life was on the work of the 17th-century astrologer William Lilly.

Euphraeus: Euphraeus (Ancient Greek: Εὐφραῖος ; fl.  c. 4th century BCE; d. ca. 342 BCE/341 BCE) was a philosopher and student of Plato from the town of Oreus in northern Euboea.  He appears to have been active in politics in addition to his speculative studies, being first an adviser to Perdiccas III of Macedon and then an opponent of Philip II and his supporters in Oreus.  Information regarding his life is scant, however, and few facts about it are mentioned in more than one source.  He appears in the "Fifth Letter of Plato", Demosthenes' "Third Philippic", and Athenaeus' "Deipnosophistae" (which repeats the information about him contained in the now-lost "Historical Notes" by Carystius of Pergamum).

Supporting paragraphs: Luminary (astrology) Aristotle
Answer: Aristotle