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).
Definition of Antagonist. In literature, an antagonist is a character, group of characters, or other force that presents an obstacle or is in direct conflict with the protagonist.The antagonist is most often one character who has a goal that opposes the protagonistâs goal and will try to stop the protagonist from getting what he or she wants.efinition of Antagonist. In literature, an antagonist is a character, group of characters, or other force that presents an obstacle or is in direct conflict with the protagonist.