PN stands for various terms. Discover the full forms, meanings, and possible interpretations of PN across different fields and industries.
A shell of gas surrounding a small, white star. The gas is usually illuminated by the star, producing a variety of colors and shapes.
AstronomyCelestial ObjectScienceScientific & EducationalWritten and stamped undertaking to pay a specified sum of money on or before a specified date
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