By Hamish Johnston
Would you like to ask Nobel laureate John Mather a question?
Maybe you want to know why he decided to study the temperature distribution of the cosmic microwave background — which won him a share in the 2006 prize for physics
Or perhaps you want to ask him what it the most important challenge facing cosmologists today?
Or you could ask him how he spent his prize money!
The Nobel Foundation has joined forces with YouTube to allow you to upload a video of your question — and Mather will answer a selection of queries on video. You can find out more here.
The deadline for questions is 30 October, and you can post as many questions as you like.