"I want to thank Sultan for his very special message, and I hope it will provide added inspiration to our 3,000 students who will cross the stage this week to become graduates of the University of Brighton. They join a global community of 190,000 alumni in 140 countries who are putting their learning and knowledge to use to create positive change and shape a better future for us all."
Professor Humphris continued: "Sultan's achievements are, quite literally, out of this world. He is a credit to our university and we cannot wait to hear about his exploits when he returns to Earth."
Sultan Al-Neyadi's message in full:
"Greetings from space! My name is Sultan Al Neyadi and I am an astronaut living and working on board the International Space Station.
"I would like to say congratulations to all the graduates from Brighton University, a place where I studied and graduated almost 20 years ago.
"You're here today because you have studied well, you have thrived and you have paid a lot of attention and this is the result of your patience and dedication.
"I'm sure your future is going to be even brighter and happier. I wish you all the best in your future endeavours and see you soon."