Match the terms to the appropriate blank in the sentences. Our Sun belongs to the ___________ of the Milky Way Galaxy. The globular cluster M13 belongs to the ______________ of the Milky Way Galaxy. A(n) ____________ contains hot, ionized gas but very little cool gas or dust. The Milky Way is a(n) ________ galaxy. The type of galaxy known as a(n) _________ was more common in the universe 10 billion years ago.