'Gravitational pressure' diaporamas de présentation

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STELLAR EVOLUTION

STELLAR EVOLUTION. The life cycle of stars. EMPTY SPACE?. So called empty space actually has a density of .1 to 1 particles per cubic centimeter. Also present are quantum virtual particle pairs and all sorts of energetic disturbances such as supernova shock waves, gravity waves, and radiation.

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ASTROPHYSICS

ASTROPHYSICS. SUMMARY. Constellation is a group of stars that form a pattern as seen from the Earth, but not bound by gravitation. Stellar cluster is a group of stars held together by gravitation in same region of space, created roughly at the same time.

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