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| physical object > natural object > celestial body > star > emission line star > T Tauri star > YY Orionis star > YY Orionis |
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| YY Orionis comparison table | ||||
| Subject | is part of | is an instance of | is a kind of | has definition |
|---|---|---|---|---|
| YY Orionis star | T Tauri star | Very young, late-type, low-mass stars in the gravitationally contracting stage in which the star is still accreting matter from the protostellar cloud. | ||
| YY Orionis | Orion | YY Orionis star | An extremely young star (younger than T Tauri) in the Orion Nebula. |
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