There are inconceivable numbers of stars and most of them have orbiting planets. We've already discovered more than 5,000 confirmed exoplanets in nearly 4,000 planetary systems within our own galaxy. Those statistics suggest that, extending across the cosmos, there must be a huge number of Earth-like rocky planets, with liquid water, in "Goldilocks" orbits around their stars (or Earth-like moons orbiting gas-giant planets).
1. Do they hold life?
2. Intelligent life?
3. Technologically intelligent life?
If we are not the only sentient beings in the cosmos, that's mind-boggling!
If we are the only sentient beings in the cosmos, that's mind-boggling!
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