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A "nova". About 500 years ago, an observer watching the sky observed a new star where there had never been one visible before. (500 years ago, there were no street lights and the night sky was DARK. There wasn't much to do other than to look at the stars.)

Since the observer was in Europe and the educated classes all wrote in Latin, he called it a "nova stellarum", which is Latin for "new star". The name "nova" has stuck.

Now, of course, we know SO much more than they did in the middle ages, and now we know that the "new star" was actually the last gasp of a DYING star; a star too far away to be visible, flaring into temporary brightness as it exploded, and the glow fading as the explosion spread out.

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13y ago

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