Labels:text | screenshot | font | number OCR: INTERSTELLAR INTERSTELLAR literally means "between the stars" and describes any occurrence and any form of matter or energy in the space between the stars in a galaxy. Most interstellar matter is hydrogen gas, although a proportion is in the form of tiny dust particles. In the Milky Way Galaxy, the mass of material in interstellar space is about 10 percent of the total mass of all the stars.
