When you are thinking about going away for a long duration mission, it has to be part of your mindset that you're leaving your family, but it's for the right reasons, for good reasons, and hopefully helping humanity.

In space, you need to stay as 'usual' as possible. On the space station, I would brush my hair every day.

My first mission was six and a half months. We weren't exactly sure how long it was going to be because I went up and back on the space shuttle, which was dependent on weather for launch and landing.

Sunita Williams Quotes