NASA will announce a new class of astronaut candidates on Wednesday.

Prior to the big reveal, existing members of the Astronaut Corps recorded a series of messages to greet the next generation of space-going people.

The welcome video is a fun and informative peek into the world of astronauts, who must undergo rigorous training for the chance to rocket off the planet.

The video, posted on Monday, kicks off with Peggy Whitson, class of 1996, who is currently on board the International Space Station.

She spins around in microgravity and says, "This is the most, I can guarantee, the most unique environment that you will ever work in.

Michael Barratt, class of 2000, says he remembers how he felt "totally outclassed" at the beginning of his training.

The text above is a summary, you can read full article here.