Columbia subject headings:
Astrophysics.
Expanding universe.
General relativity (Physics)
Kinetic theory of matter.
Transport theory.
Harvard subject headings:
Astrophysics
Expanding universe
General relativity (Physics)
Kinetic theory of matter.
Transport theory.
Princeton subject headings:
Astrophysics.
Expanding universe.
General relativity (Physics)
Kinetic theory of matter.
Transport theory.