Notes. 1  For the purpose of this 1 in 5 statistic, Sun-like means G-type star. 2  For the purpose of this 1 in 5 statistic, Earth-sized means 1â2 Earth radii. 3  For the purpose of this 1 in 5 statistic, habitable zone means the region with 0.25 to 4 times Earth's stellar flux (corresponding to 0.5â2 AU for the Sun).
Wiktionary (0.00 / 0 votes) Rate this definition: nemesis (Noun). An archenemy. nemesis (Noun). A person or character who specifically brings about the downfall of another person or character. nemesis (Noun). The principle of retributive justice. nemesis (Noun).
Quick Answer. In classical and traditional literature, the protagonist is the main character of the story while the antagonist is the character or group of characters who oppose the protagonist. Both words come from the Greek language, protagonist means first combatant, and antagonist means opponent or competitor.