Though nova means new, nova stars really are not. A star goes through phases which vary with certain properties, the most notable being their mass.
If star goes nova it brightness increases many thousands of times, occasionally many millions. Supposing the star were so far away it was invisible to us, if it increased so much in brightness it may become visible and consequently it would be 'new' to us though in fact it is probably billions of years old.
Nova is the Latin word for "new" and Latin was the language of early modern astronomy, as of all science in medieval and Renaissance Europe. A suddenly glowing star in the night sky would be considered a "new star" or "stella nova." This eventually was shortened to "nova."
A nova
nova probally
The Latin phrase for "new star" is "nova stellarum". Since the early astronomers spoke Latin for the most part, when we see a "new" star appear in the sky, we call it a "nova".
nova
NOVA
Usually a nova - an exploding star.
Nova. "Exploding stars" were originally called "new stars", which in Latin is "nova stellarum".
Planets cannot become novae; a "nova", or more completely "nova stellarum", is the term given to a "new star" that appears when an old star explodes.
Nova and Novum mean 'new' in Latin. Not to be confused with Novem which means nine.
A nova is a sudden, bright outburst of a star that occurs due to the accumulation of hydrogen on the surface of a white dwarf star in a binary star system. While novae can appear as "new stars" in the sky because of their sudden increase in brightness, they are not actually new stars forming, but rather the result of a specific stellar phenomenon.
Yes, this has happened several times. However, it isn't a NEW star, but an old one dying. During the middle ages, some observers would rarely observe a star, sometimes quite bright, appear where no star had been seen before. They called this a "nova stellarum", or "new star". Typically, the "nova stellarum" would be visible for several weeks and would then fade from view. In one case, the "new star" was so bright as to be visible during the day! We now know that this "nova" wasn't a NEW star; it was a titanic explosion of an old star that had been too dim to be visible, blowing itself apart.