The ideal way to discover more about a planet is for humans to visit it

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The ideal way to discover more about a planet is for humans to visit it. They can then collect samples and conduct any necessary experiments. Space travel for humans can be dangerous, though, and a decision on whether it is appropriate must be carefully weighed to determine whether it is worth the risk.

1. What are some health risks astronauts face during space travel?
2. Kepler-186f is approximately 490 light years away, which means that it would take a spacecraft moving at the speed of light about 500 years to reach it. It is therefore impossible to send people to the planet. Suggest other ways in which scientists can continue to discover more about this planet.