[Adrian Snowling]

Adrian Snowling asked the Naked Scientists:
   
Hi guys, love the show (of course).

Anyway on the last show you were discussing cosmic rays coming from a star that died 640m years after the start of the universe(when the universe was 5% of its present age). This star died 13 billion years ago when the universe was apparently one ninth of its present size.

If the universe was so much smaller, why then why did the rays take so long to reach us or is the universe expanding at pretty much the speed of light?

What do you think?

[Mr. Scientist]

Not quite sure how many times faster than c it is expanding at. However, its superluminally-expanding to answer your question, and getting faster every second.