No one knows exactly how big space is because the universe keeps on expanding which means that space could be a whole lot bigger than we even think. In terms of human future it is the time after the past and present. Looking at the present situation we humans are suffering from a lot of pollution and effect of global warming and if not dealt with appropriately we may not even have a future.
Many space travelers have returned with a more positive view of themselves and their place on the planet. Being in space is a powerful experience that can have a long lasting, positive impact on the psychological well-being of individuals who are opportuned to go there. Also it fuels our curiosity and imagination among we the younger generation and makes us curious to learn and explore.
In space, astronauts are exposed to various and increased levels of radiation that are different from those on Earth. From research increased risk of cancer and degenerative diseases, such as heart disease have been observed among humans exposed to radiation on Earth. Health risks for astronauts from radiation exposure in space are mainly driven by long-term impacts. Even though astronauts are made to take various test especially the one partaining immunity, more research is needed into whether spaceflight alters immunity and can cause the immune system to attack the healthy cells, organs, and tissues present in the body.
The question is;
The health impact of the environment seems to take a toll on the astronauts and not immediatly but it takes time to manifest, so is space really a habitable for we humans or best for exploration?