We all know that life on earth can be depressing at times. But if it's really getting (1) you down, why not think about the possibility of moving to a different environment. It's assumed that by the year 2050 technological solutions will allow (2) people to settle on other planets with a perfect potential for generating their own energy out of local resources (3). However, there are plenty of obstacles (4) to overcome until the first successful settlement on Mars, for example, is viable. Outer space is known to be a hostile environment with no oxygen to breathe, extremely low temperatures, and cosmic radiation can also prove to be hazardous (5) and go below absolute zero. The solar system and space (7) are also challenging for fragile earthly organisms.
Although we take our elementary life support system for granted (8) here on earth, there is no saying what might happen if we set out on a trek in space without the protection of the earthly atmosphere. Happily, the contemporary space expeditions have been thoroughly planned to safeguard (9) our astronauts against the immensely harsh (10) of the inhospitable surroundings of space. Therefore, they are located in hermetic and sealed cabins with conditions simulating those on earth. Supply of air and
The first step towards space colonization is still to be made. The prospects are that the pioneers will only be provided with the most necessary equipment and that their advancement will be carefully examined by the experts in a variety of fields (12) including astronomy, medicine, physics, and biology.
Note: Some words were provided in the original question, and some words were inferred based on the context.