Home›More›Articles›The missing mass Zwicky found was not the dark matter we know todayArticleThe missing mass Zwicky found was not the dark matter we know todayConnectionsSourcesComments (0)Reader Challenges (0)ConnectionsArticle OnDark Matter, Theories Well-attested SourcesDark Matter (Wikipedia)tier 3WikipediaWikipedia: Dark matter, History section, subsections 1884 to 1940 and 1970sQuote, Wikipedia: Dark matter, History section, subsections 1884 to 1940 and 1970sBy the late 1970s the existence of dark matter halos around galaxies was widely recognized as real, and became a major unsolved problem in astronomy.View the SourceScience Atlas Long-Form ArticlesComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.