The Exciting Star of Planetary Nebula NGC3132

Details The Exciting Star of Planetary Nebula NGC3132 The Exciting Star of Planetary Nebula NGC3132

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977msngr..10....2k&link_type=abstract

The Messenger, vol. 10, p. 2-3

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The term "Planetary Nebula" was coined when 18th-century astronomers discovered celestial objects that looked similar to the solar-system planets in their small-aperture telescopes. We now know that these nebulae have their origin in stellar outbursts (explosions) during which a star throws away consecutive shells of matter which afterwards expand around the central star. Spectroscopic analyses of the nebulae indicate that these stars are intense sources of ultraviolet radiation that excite the atoms in the nebulae. This is almost always confirmed when direct spectroscopic observations are made of the stars situated at the centres of the planetary nebulae: they are exceedingly hot, often the surface temperature is of the order of 100,000 °K.

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