Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleQ: How do we know the universe is expanding, and what exactly does that mean?AuthorsRobertson, BillAbstractThe article provides an answer to a question of how one can know that the universe is expanding.SubjectsASTRONOMY; METAPHYSICAL cosmologyPublicationScience & Children, 2008, Vol 46, Issue 1, p62ISSN0036-8148Publication typeArticle