Question: What mythical Greek king killed his father and married his mother.

Context paragraphs:
Giant-impact hypothesis: The giant-impact hypothesis, sometimes called the Big Splash, or the Theia Impact suggests that the Moon formed out of the debris left over from a collision between Earth and an astronomical body the size of Mars, approximately 4.5 billion years ago, in the Hadean eon; about 20 to 100 million years after the solar system coalesced.  The colliding body is sometimes called Theia, from the name of the mythical Greek Titan who was the mother of Selene, the goddess of the Moon.  Analysis of lunar rocks, published in a 2016 report, suggests that the impact may have been a direct hit, causing a thorough mixing of both parent bodies.

Apollon Kalamarias: Apollon Kalamarias (Greek: Απόλλων Καλαμαριάς) is a Greek sport's club from Thessaloniki founded in 1926 it is the best supported team in Greece.  The club is named after Apollo, the mythical Greek god and its colors are red and black.

Aster (missile family): The Aster missile series, primarily comprising the Aster 15 and Aster 30 are a family of vertically launched surface-to-air missiles.  The name ""Aster"" originates from the mythical Greek archer named "Asterion" (in Greek mythology), Asterion likewise receiving his name from the ancient Greek word aster (Greek: ἀστήρ ), meaning "star".  Aster is manufactured by Eurosam, a European consortium consisting of MBDA France, MBDA Italy (combined 66%) and the Thales Group (33%).  The missile is designed to intercept and destroy a wide range of air threats, such as supersonic anti-ship cruise missiles at very low altitude (Sea-skimming) and fast flying, high performance aircraft or missiles.

Polynices: In Greek mythology, Polynices, sometimes spelled Polyneices, (Greek: Πολυνείκης, transl.  "Polyneíkes", "manifold strife") was the son of Oedipus and Jocasta.  His wife was Argea.  His father, Oedipus, was discovered to have killed his father and married his mother, and was expelled from Thebes, leaving his sons Eteocles and Polynices to rule.  Because of a curse put on them by their father Oedipus, the sons Polynices and Eteocles did not share the rule peacefully and died as a result by killing each other in a battle for the control of Thebes.

Leo (constellation): Leo is one of the constellations of the zodiac, lying between Cancer the crab to the west and Virgo the maiden to the east.  Its name is Latin for lion, and to the ancient Greeks represented the Nemean Lion killed by the mythical Greek hero Heracles (known to the ancient Romans as Hercules) as one of his twelve labors.  Its symbol is (Unicode ♌).  One of the 48 constellations described by the 2nd-century astronomer Ptolemy, Leo remains one of the 88 modern constellations today, and one of the most easily recognizable due to its many bright stars and a distinctive shape that is reminiscent of the crouching lion it depicts.  The lion's mane and shoulders also form an asterism known as "The Sickle," which to modern observers may resemble a backwards "question mark."

Oedipus: Oedipus ( or or ; Ancient Greek: Οἰδίπους "Oidípous" meaning "swollen foot") was a mythical Greek king of Thebes.  A tragic hero in Greek mythology, Oedipus accidentally fulfilled a prophecy that he would end up killing his father and marrying his mother, thereby bringing disaster to his city and family.

230 Athamantis: 230 Athamantis is a fairly large main-belt asteroid that was discovered by the German-Austrian astronomer K. de Ball on September 3, 1882, in Bothkamp.  It was his only asteroid discovery.  The asteroid was named after Athamantis, daughter of Athamas the mythical Greek king of Orchomenus.

G.S. Iraklis Thessaloniki: Gymnasticos Syllogos Iraklis (Greek: Γυμναστικός Σύλλογος Ηρακλής , English: Gymnastics Club Heracles ), commonly referred to as Iraklis, is a Greek multi-sports club based in Thessaloniki.  The club was founded in 1908 as "Macedonikos Gymnasticos Syllogos" ("Macedonian Gymnastics Club") and is one of the oldest and most historic sports-clubs in Greece.  It is named after Heracles, the mythical Greek demigod.  Their colours are blue or cyan and white, inspired by the Greek flag.

Epopeus (king of Sicyon): In Greek mythology, Epopeus ( ; Greek: Ἐπωπεύς ) was a mythical Greek king of Sicyon, with an archaic bird-name that linked him to "epops" (ἔποψ), the hoopoe, the "watcher".  A fragment of Callimachus' "Aitia" ("Origins") appears to ask, "Why, at Sicyon, is it the hoopoe, and not the usual splendid ravens, that is the bird of good omen?"

Laodice (wife of Mithridates II of Commagene): Laodice (Greek: η Λαοδίκη), was a Greek woman who lived in the 1st century BC.  She had married the Greek King from the Kingdom of Commagene, Mithridates II of Commagene, the first son and heir to Greek King Antiochus I Theos of Commagene and Greek Queen Isias of Commagene.  Mithridates II reigned as King of Commagene from 38 BC-20 BC.

Supporting paragraphs: Polynices Oedipus
Answer: Oedipus