This number is not static; new discoveries are added regularly by astronomers worldwide, and more than 8,000 additional candidate planets are awaiting confirmation.

NASA confirms discovery of 6,000 alien planets outside our solar system, could life exist out there?

NASA's Kepler Mission has identified thousands of exoplanets but leaves a lot of questions about alien worlds.

Opinion: What are NASA's exo-planets

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NASA confirms discovery of 6,000 alien planets outside our solar system, could life exist out there?

Opinion: What are NASA's exo-planets