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:

Stephen Hawking's 70th birthday celebration: A copy of the Simpsons script in which Stephen Hawking appeared, one of the objects on display at the Science Museum as part of the exhibition.PA
Stephen Hawking's 70th birthday celebration: Stephen Hawking's most famous book ' A Brief History of Time' is seen on display at the Science museum in London.PA
Stephen Hawking's 70th birthday celebration: The Science Museum displays objects and papers showing the work of British physicist Professor Stephen Hawking in London Thursday,PA
Stephen Hawking's 70th birthday celebration: A working diagrammatic paper by British physicist Professor Stephen Hawking entitled 'Black Hole and Unpredictability' is seen on display at the Science museum in London Thursday, Jan. 19, 2012PA
Stephen Hawking's 70th birthday celebration: Visitors to a private reception to mark the launch of the exhibition ÔStephen Hawking: A 70th birthday celebration' at the Science Museum, London.PA
Stephen Hawking's 70th birthday celebration: A man and woman take a closer look at the exhibition 'Stephen Hawking: A 70th birthday celebration' on display at the Science Museum.PA