标题： 对H.L. Johnson和W.W. Morgan（1953）所著论文"修订版耶基斯光谱图中光谱类型标准的基本恒星光度测量"的评论 显示英文标题

标题： Comments on the Paper "Fundamental Stellar Photometry for Standards of Spectral Type on the Revised System of the Yerkes Spectral Atlas " by H.L. Johnson and W.W. Morgan (1953)

摘要： 这篇短文将作为美国天文学会百年庆典的一部分发表。 它介绍了一些历史背景，并讨论了H.L.约翰逊和W.W.摩根于1953年发表的论文的重要性，这些作者在该论文中介绍了UBV测光系统和MK光谱分类系统。 显示英文摘要

摘要： This short paper is to be published as part of the centennial celebrations of the American Astronomical Society. It presents some historical background on, and discusses the importance of, the 1953 paper by H.L. Johnson and W.W. Morgan, in which these authors introduced the UBV photometric system and the MK system of spectroscopic classification.