1968 69 112 A model of the Milky Way galaxy is derived from the Elsässer and Haug brightness distribution data.
1973 C. Sagan (1975) vii. 50 (caption) Composite photograph by all-sky cameras of our Milky Way Galaxy.
2000 Feb. 185/2 The famous ‘Drake equation’.. purports to calculate the very large number of technological civilizations in the Milky Way galaxy.