Fired up! Did you miss today's booster test for our Space Launch System, the world’s most powerful rocket? Watch it now! During the SLS flight the boosters will provide more than 75 percent of the thrust needed to escape the gravitational pull of the Earth, the first step on our journey to Mars. More: http://www.nasa.gov/sls | NASA - National Aeronautics and Space Administration

1.3K views · 23 reactions | We’ve all dreamt about journeying into space at some point or another, but what exactly does it take to become an astronaut? From 'poo-aiming' tests to learning how to not be a messy eater, we've got some weird and wacky secrets from a former Nasa astronaut. | Metro | Facebook