Astronomy & Astrophysics 101: Planetary Nebula
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Astronomy & Astrophysics 101: Planetary Nebula
What Is a Planetary Nebula? A planetary nebula is a region of cosmic gas and dust formed from the cast-off outer layers of a dying star. Despite their name, planetary nebulae actually have nothing to do with planets. Intermediate-mass stars have a mass between 80% and 800% of the Sun’s mass. When
scitechdaily.com2022年10月14日
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Hubble vs James Webb! 😯Southern Ring Planetary Nebula! The bright star at the center of NGC 3132, while prominent when viewed by NASA’s Webb Telescope in near-infrared light, plays a supporting role in sculpting the surrounding nebula. A second star, barely visible at lower left along one of the bright star’s diffraction spikes, is the nebula’s source. It has ejected at least eight layers of gas and dust over thousands of years.But the bright central star visible here has helped “stir” the pot,
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Hubble vs James Webb! 😯Southern Ring Planetary Nebula! The bright star at
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🐱 Cat’s Eye Nebula! This extraordinary cosmic object is called a planetary nebula, which form when a Sun-like star ejects its outer gaseous layers, creating a bright nebula with amazing shapes. Observations of the Cat’s Eye Nebula suggest that it was created by a star that cast off its mass in a series of pulses at 1,500-year intervals. Each resulting dust shell contains as much mass as all of the planets in our solar system combined…which is still only one percent of our Sun's mass! This nebul
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🐱 Cat’s Eye Nebula! This extraordinary cosmic object is called a planetary nebula,
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