The Formation and Structure of Stars Chapter 9. The Big Picture Stars exist because of gravity. Gravity causes interstellar material to collapse to form.
The Formation and Structure of Stars Chapter 9. The space between the stars is not completely empty, but filled with very dilute gas and dust, producing.
The Formation and Structure of Stars
The Interstellar Medium
The Interstellar Medium. I. Visible-Wavelength Observations A. Nebulae B. Extinction and Reddening C. Interstellar Absorption Lines II. Long- and Short-Wavelength.
