Comet Hale-Bopp (formally designated C/1995 O1) was arguably the most widely observed comet of the twentieth century, and one of the brightest seen for many decades.

• 海尔波普彗星（编号为C/1995O1）被公认为是二十世纪最广泛关注的彗星，也是近几十年里最明亮的彗星之一。