nova中文

时间: 2024-11-08 07:17:23

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nova
/ 5nEJvE /

◙ (pl. novae -viː 或 novas)
1. [Astronomy] a star showing a sudden large increase in brightness and then slowly returning to its original state over a few months
• [天文] 新星。
--› see supernova
2. Novae are believed to occur in binary star systems. Material falling from a companion star to the surface of a white dwarf collects over a long period, increasing in density and temperature, until there is a sudden runaway thermonuclear reaction which blasts much of the accumulated material into space. Novae are often visible in small telescopes, and sometimes to the naked eye

【语源】

1. late 19th cent.: from Latin, feminine of novus 'new' (because such stars were thought to be newly formed)