IC 4663 vs NGC 1514
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IC 4663
IC 4663 is a planetary nebula in the constellation Scorpius, formed from material expelled by a star near the end of its evolution. Its central star has a hydrogen-deficient spectrum dominated by helium, a composition that has attracted attention in studies of planetary-nebula nuclei and stellar evolution. The surrounding ionized gas emits light after being energized by ultraviolet radiation from...
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NGC 1514
NGC 1514, often referred to as the Crystal Ball Nebula, is a planetary nebula located in the constellation Taurus. It was discovered by astronomer William Herschel in 1790, and its observation forced him to revise his theories, recognizing that nebulosity could surround a central star rather than just being distant star clusters. Modern observations by NASA's Wide-field Infrared Survey Explorer re...
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