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Hertzsprungin-Russellin kaavio
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Finnish
Etymology
After Ejnar Hertzsprung and Henry Norris Russell.
Noun
Hertzsprungin-Russellin kaavio
fi astronomy Hertzsprung-Russell diagram
Declension
Hertzsprungin-Russellin kaavio a