Image Categories
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Galaxies
Massive, gravitationally bound systems -
Nebulae
Interstellar clouds of dust, hydrogen gas, helium gas and plasma -
Solar System
The Solar System consists of the Sun and those celestial objects bound to it by gravity -
Star Clusters
Star clusters or star clouds are groups of stars -
Planets
Celestial bodies orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity
