天体
天体（astronomical object，也称为celestial object）是拉可观测宇宙中，经由科学确认渠存在个物体、或是结构。
天体可能像恒星、行星、彗星等结合较紧密个星体或类星体，也可能是指一个复杂个，彼此关联较松散个结构，如星团、星系。
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