Overview of the universe, our solar system and the ... - APRSAF
Overview of the universe, our solar system and the ... - APRSAF
Overview of the universe, our solar system and the ... - APRSAF
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Most pessimistic case:1 civilization for<br />
100,000 galaxies (100 million light<br />
years)<br />
Most optimistic case:1 civilization for<br />
100 stars in one galaxy (10 light years)<br />
100 civilizations for 1 Galaxy(several<br />
1000 light years)