n.新星(短期内突然变得很亮)

原形：nova复数：novae

The nova erupted with a blinding intensity, lighting up the night sky.
这颗新星以耀眼的强度爆发，照亮了夜空。
Astronomers observed a nova in the constellation Cygnus last week.
天文学家上周观测到了天鹅座中的一颗新星。
The nova's brightness diminished gradually over several months.
这颗新星的亮度在几个月内逐渐减弱。
The explosion of a nova is a result of a binary star system's interaction.
新星的爆炸是双星系统相互作用的结果。
Novae are not as destructive as supernovae, but they still release enormous energy.
新星虽然没有超新星那么破坏性，但它们仍然释放出巨大的能量。
Studying novae helps scientists understand the lifecycle of stars.
研究新星有助于科学家理解恒星的生命周期。
The nova's spectrum revealed elements like hydrogen and helium.
通过新星的光谱可以发现氢和氦等元素。
Observing novae is crucial for tracking cosmic expansion.
观测新星对于追踪宇宙膨胀至关重要。
In ancient times, novae were often considered omens or celestial signs.
在古代，新星常被视为预兆或天象的象征。
The frequency of nova eruptions varies greatly from one star system to another.
新星爆发的频率在不同的星系之间差异很大。