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).
The word also sometimes refers to the character or medium by which this justice is brought about as Nemesis was the patron goddess of vengeance according to classical mythology.Example: In the popular book series Harry Potter, the protagonist Harry Potter is the nemesis of the evil Lord Voldemort.emesis was also called a death enemy. These people are mostly referred where situations of killing the protagonist comes to karma, reflecting or triggering something or someone against him or her.