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.

 

1. What are some health risks astronauts face during space travel?

In space travel, there will always be risks. From takeoff, many things can go wrong and cause the cancellation of the trip until the death of the astronauts as has already happened.

Once a successful takeoff has been made and the spacecraft leaves the Earth's atmosphere. The health risks for astronauts are increasing the further they travel from Earth. The longer the travel time, the health of travelers can be compromised. The loss of muscle mass due to lack of gravity is one of the main physical health problems that can exist. Redistribution of body fluids, taste or vision alteration, loss of sanity, alteration of the sleep cycle, exposure to stellar radiation.

These are just a few of the physical and mental health problems astronauts can face when going into space. But there are also external problems. Asteroids, meteorites, space debris that travels thousands of kilometers per hour that could cause damage to the spacecraft where the astronauts are transported and leave it adrift or even destroy it. Another problem is solar radiation. Within the Earth's atmosphere we are protected by our magnetic field, which absorbs or rejects most of the radiation from the sun. But in space, astronauts would be more prone to this. In the case of eternal celestial bodies, such as other planets or moons. Astronauts would be face to face with the unknown, because no matter how much a foreign body is studied from a distance, surprises will always be found that could be dangerous.

1. 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.

For the study of such distant celestial bodies, space travel as we know it today is impractical. Even developing a method that can take us to the speed of light. A 500-year journey would not be the most practical way to determine whether or not a planet is viable for life. That should be determined from here and start the journey when you already have some certainty that life can develop or remain on that planet.

Massively large telescopes are currently being developed in places like Chile or the Canary Islands. Because of its dry and very clean atmospheric space. These telescopes would be able to offer images with higher resolution than the Hubble telescope, which could help to better study exoplanets (Planets that orbit stars other than our sun). They can also provide images in different light spectra, which helps determine the elements present in different bodies. Since each element reflects light differently, it is possible to study the chemical composition of the planet and determine if there is a presence of oxygen or water.

Radio telescopes also offer an alternative for studying bodies that are so distant. Even though we cannot see the image of what is there, we can listen and map different frequency spectra that would also help us determine the conditions of each distant planet found.

Already looking towards a more distant future where we can find other ways of traveling that today are only theories, such as wormholes for example. We could entertain the idea of ??interstellar travel that doesn't take 100 years, but a couple of decades.