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physical object > natural object > celestial body > collection of stars > collection of galaxies > binary galaxy |
binary galaxy comparison table |
Subject | has number of galaxie | has definition | has synonym | is a kind of |
---|---|---|---|---|
collection of galaxies | collection of stars | |||
binary galaxy | 2 | Two galaxies orbiting each other owing to their mutual gravitational attraction. | double galaxy | collection of galaxies |
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