National Aeronautics and Space Administration

We're now in the middle of doing vibration tests on the entire satellite. I've been through so many of them so far (they do them at just about every stage to make sure that everything will hold up in space), I thought I knew exactly what to expect. Same old thing, right? But it's actually a very neat experience to do a vibration test now that I'm on the satellite!

Now that I'm on board, they're shaking everything – me, the telescopes, the other instruments, and all of the framework and coverings around us. It's like a flight simulation, because these tests are giving me a taste of what it'll feel like to be launched into space on the rocket. I'm snug and comfortable in here. Things are looking good!