The London Science Museum opened an exhibition on renowned physicist Stephen Hawking's personal collection on Thursday as part of his 70th birthday celebrations.

"Stephen Hawking: A 70th birthday celebration," features objects and papers primarly sourced from the cosmologist's own collection which have not been made public till now.

The exhibition showcases handwritten notes on work with Roger Penrose, his drawing of the Hawking Radiation mechanism, an annotated script for a 1999 guest appearance on 'The Simpsons', and the blue suit he wore for a zero-gravity flight in 2007.

The Science Museum which Hawking once described as "one of my favourite places", also displays a selection of personal photographs from his life and career and a specially recorded message for the Science Museum.

Check out the never before seen personal collection of Stephen Hawking on display at the London Science Museum: