Major Timothy Peake has sent his final tweet before starting his 6-month mission aboard the International Space Station.
The British astronaut will blast off today at 11:03am (GMT) from the Baikonur Cosmodrome in Kazakhstan and the Soyuz rocket has already arrived at its launch site, dubbed Site No 1.
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Major Peake was selected in 2009 to become the first UK astronaut to work on the ISS. Selected out of 8,000 candidates he then underwent a series of gruelling tests and challenges in order to make sure he was ready for the long-haul mission aboard the space station.
The Briton will have his hands full for the duration as not only will he have to carry out a range of experiments on behalf of scientists on the ground but he'll also have to take almost perfect care of himself as researchers analyse his food intake.
- Twitter: @astro_timpeake
- Instagram: astro_timpeake
- Facebook: ESATimPeake
- Flickr: timpeake
- Blog: astro_timpeake