Comet - Ice, rock and dust, Meteor - Rock burning up in Earth's atmosphere, Nebula - Stellar nursery where gas and dust will soon form a star, White Dwarf - Retired or aged star, Supernova - Exploding star, Neutron Star - Collapsed core of a massive supergiant star, Black hole - Region of space where gravity is so strong that nothing — no particles or even electromagnetic radiation such as light — can escape from it,

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