also: ノヴァ
noun
nova
Astronomical term for a star that suddenly becomes much brighter and then gradually fades.
See also: 新星
昨夜、アマチュア天文家が新しいノバを発見した。
Last night, an amateur astronomer discovered a new nova.
ノバは超新星ほど明るくはならない。
A nova does not become as bright as a supernova.