Terribly sad - a truly amazing man and an amazing life. I hope he gets to play amongst his stars for eternity.
What a great human being. He is one who really will be missed. RIP
Clever couragous man, lasted a lot longer than predicted 
An inspiration…I’ve never managed to finish reading a brief history of time, perhaps I should give it another go in his honour…
James beat me to the sad announce of Stephen Hawkings passing.a remarquable person could i call him a genius the word would not be too much.Now he is somewhere with other geniuses.Will always remember and admire him RIP
Very sad to wake up to this news this morning. A true genius and an example of overcoming the odds. Amazing man. RIP.
It’s only on reading all the blurb today… that I understand how he lasted so long. I had always assumed it was because he could afford certain medical stuff (or whatever) but, it was due to a rare form of the disease that only progressed slowly…
I’m glad he was able to die at home, surrounded by his family. That means a lot in my view. 
Very moving…
Professor Brian Cox’s Beautiful Tribute To Stephen Hawking
Shared from my Google feed
Thanks for posting that Simon, I was waiting to hear what Brian had to say.