1 . Many of us spent our childhoods dreaming of becoming astronauts.However, the hard reality is that only a select few will make it.    1    Not necessarily.

In fact, some of the space jobs are not only for astronauts and they all sound just as cool.One of the most interesting space jobs that you may have never heard of is “chief sniffer （嗅探员）NASA has already hired a chief sniffer named George Aldrich, whose job is to smell materials before they are used in spacecrafts.

    2    A spacecraft is of limited size and relatively high temperature, which makes smells stronger inside of it."Once a spacecraft is launched, astronauts have no way of escaping unpleasant smells." Aldrich told The Telegraph.More importantly, smelling objects can help identify dangerous chemicals that could threaten astronauts' health.

Another job, the “space tour guide”， may seem a little ahead of its time ——after all, what's the point of hiring a tour guide when there aren't any tourists there? But now, many private companies are starting to provide space trips, and wealthy space enthusiasts such as Justin Bieber and Sarah Brightman have already signed up for tours.    3    

Being a space tour guide requires rich knowledge of astronomy, astrophysics, geography and history to help passengers get the most out of their journey.    4    

Astronauts often spend weeks or even months in a small capsule with the same group of people, which is why a “space psychologist” is also needed to help astronauts overcome mental challenges, like feeling bored and lonely.

Rohit Talwar, chief executive of US company Fast Future Research, said, "We're crossing the boundaries（界限）between science fiction and reality.    5    ”