Is it a correlation ? I do not think so,  as both the discoveries have thrilled the mankind.

I am talking about the discoveries of Graphene and evidence of accelerating expansion of our universe ! 

Graphene won the Nobel Prize in Physics (2010) and this year it is accelerating expansion of universe (2011).

It is mere a coincidence that two extreme ends of length scale, one being the nanoscale and other being the cosmic scale,  have been awarded the prize in consecutive years.

Congrats to the astrophysicists for their great contribution in the field !