Chris Lintott, an astrophysicist from the University of Oxford and co-presenter of the BBC's The Sky at Night, joins us in the pod to tell us about extrasolar planets, galaxy formation and the LCROSS moon impact.
We dial up dark matter expert Prof Ofer Lahav from University College London.
We also pay a visit to the very centre of space and time (on Earth at least), The Royal Observatory Greenwich. Take a visual tour around the historic site.
In the newsjam, we look at the discovery of fossil Ardi, the oldest skeleton of a human ancestor ever discovered, brain-boosting drugs, increasing life expectancy, as well as the Ig Nobel awards.
Science correspondent Ian Sample joins us in the studio.
Post your comments about the programme below.
Join our Facebook group.
Listen back through our archive.
Follow the podcast on our Science Weekly Twitter feed and receive updates on all breaking science news stories from Guardian Science.
Subscribe free via iTunes to ensure every episode gets delivered. (Here is the non-iTunes URL feed).
