New Grove listar The One-All-Alone och L'Astronome som separata verk (Paul Griffiths, Varèse, Edgard, Grove Music Online, http://www.grovemusic.com/shared/views/article.html?section=music.29042, hämtad 2008-01-13), men de är troligen samma komposition (Jostkleigrewe, Anne, 2006, Reaching for the stars : From The One-All-Alone to Espace, i Meyer, Felix och Zimmermann, Heidy (red.), 2006, Edgard Varèse : composer, sound sculptor, visionary).
