Description: 最初的哈勃图是一张星系速度（y 轴）与距离（x 轴）的散点图。该图显示了速度与距离之间的线性关系，从而证明远处的星系比近处的星系移动得更快，总体上星系似乎正在远离 "我们"。这也是宇宙正在膨胀的证据之一。这条直线的斜率（梯度）被称为哈勃参数（H），其方程被称为哈勃-勒梅特尔定律（Hubble-Lemaître Law）。哈勃参数在当前时刻（宇宙大爆炸 138 亿年后）的值称为哈勃常数（H₀）。根据对 Ia 型超新星的观测，哈勃图的现代迭代绘制了距离模量（利用亮度间接测量距离）与红移的关系图。事实上，原始哈勃图中星系的速度是通过红移间接测量的。

Related Terms:

• Redshift
• Standard Candle

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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