The Drake equation is used to...

estimate the number of extraterrestrial civilizations in the Milky Way galaxy
estimate the age of the universe and the number of existing galaxies
estimate the number of died stars
making computing connected with gravity and weightlessness
The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. The equation was written in 1961 by Frank Drake, not for purposes of quantifying the number of civilizations, but as a way to stimulate scientific dialogue at the first scientific meeting on the search for extraterrestrial intelligence (SETI). The equation summarizes the main concepts which scientists must contemplate when considering the question of other radio-communicative life.
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Answers by country

estimate the number of extraterrestrial civilizations in the Milky Way galaxy
estimate the age of the universe and the number of existing galaxies
estimate the number of died stars
making computing connected with gravity and weightlessness
answers
flagthe Netherlands
75%
8%
16%
0%
12
flagCanada
66%
33%
0%
0%
12
flagGreece
55%
25%
10%
10%
20
flagSwitzerland
47%
14%
33%
4%
21
flagPoland
46%
28%
12%
11%
2509
flagAustralia
44%
44%
3%
3%
27
flagIndia
43%
29%
16%
9%
174
flagFrance
43%
25%
12%
12%
16
flagthe United States
42%
33%
15%
8%
126
flagPakistan
42%
31%
21%
5%
19
flagAustria
40%
19%
22%
15%
57
flagthe United Kingdom
38%
28%
11%
20%
78
flagUkraine
35%
31%
8%
20%
45
flagGermany
31%
25%
23%
16%
271
flagRussia
30%
35%
12%
21%
116
flagthe Philippines
25%
43%
25%
6%
16
flagBelarus
21%
47%
5%
26%
19
flagKazakhstan
20%
26%
20%
26%
15
flagRepublic of Ireland
15%
61%
7%
15%
13