Columbia subject headings:
Harvard subject headings:
Galaxies--Formation--Congresses
Life--Origin--Congresses
Planets--Origin--Congresses.
Stars--Formation--Congresses
Princeton subject headings:
Cosmology--Congresses.
Galaxies--Formation--Congresses.
Life--Origin--Congresses.
Planets--Origin--Congresses.
Stars--Formation--Congresses.