Earth is hostile, too. A large part of human civilization is dedicated to making Earth more hospitable for humanity than it is in its natural state. We can do the same for space.
>Space empty
Only in a sense that a large container with a single fist-sized diamond is empty. It is empty on average. It contains an incredible amount of resources. Our solar system could easily house trillions of people (in O'Neill cylinders).
>for example in projects which research aging, cancer, overpopulation and disaster management in face of global warming
We already spend much more on these, than on space research.
Earth is hostile, too. A large part of human civilization is dedicated to making Earth more hospitable for humanity than it is in its natural state. We can do the same for space.
>Space empty
Only in a sense that a large container with a single fist-sized diamond is empty. It is empty on average. It contains an incredible amount of resources. Our solar system could easily house trillions of people (in O'Neill cylinders).
>for example in projects which research aging, cancer, overpopulation and disaster management in face of global warming
We already spend much more on these, than on space research.