Glossary term: 哈勃圖
Description: 最初的哈勃圖是一張星系速度（y 軸）與距離（x 軸）的散點圖。該圖顯示了速度與距離之間的線性關係，從而證明遠處的星系比近處的星系移動得更快，總體上星系似乎正在遠離 "我們"。這也是宇宙正在膨脹的證據之一。這條直線的斜率（梯度）被稱為哈勃參數（H），其方程被稱為哈勃-勒梅特爾定律（Hubble-Lemaître Law）。哈勃參數在當前時刻（宇宙大爆炸 138 億年後）的值稱為哈勃常數（H₀）。根據對 Ia 型超新星的觀測，哈勃圖的現代迭代繪製了距離模量（利用亮度間接測量距離）與紅移的關係圖。事實上，原始哈勃圖中星系的速度是通過紅移間接測量的。
Related Terms:
See this term in other languages
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
This is an automated transliteration of the simplified Chinese translation of this term
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
