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Unprecedented nova images illuminate astronomers' models for its ejecta

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The first images of a nova during its early fireball stage -- when it ejects material and gases expand and cool -- show that this activity is more complicated than predicted.
CHARA's measurement of angular expansion rate of the nova, combined with measurements of the expansion velocity from independent spectroscopic observations, allowed researchers to determine the distance to the star. Nova Del 2013 was found to be 14,800 light-years from the Sun. This means that, while we witnessed this explosion here on Earth last August, it actually took place nearly 15,000 years ago.

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At www.astronomy.com

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Born in Long Island public school year in Sweden as exchange student, went to Harvard one year, Cooper Union in NYC as Art student. Have two children, one of whom is rock mogul, the other has three daughters, one of whom has two daughters, making me (more...)

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