Interstellar Medium
- Interplanetary space - Interplanetary medium - interplanetary dust
- Interstellar space - Interstellar medium - interstellar dust
- Intergalactic space - Intergalactic medium - Intergalactic dust
Read more about this topic: Galactic Astronomy
Famous quotes containing the word medium:
“It is a medium of entertainment which permits millions of people to listen to the same joke at the same time, and yet remain lonesome.”
—T.S. (Thomas Stearns)