The topic was the current planetary alignment and Shmuel from the show pointed me to this neat flash orrery
Here is a screen shot showing the current alignment. The planets and orbits are not to scale in this program, but it is still cool to play with. See the interactive flash here
If you want a more complete night sky simulator you can download Stellaruim free for your computer.
During the interview I was also asked about this really cool video of a comet hitting the sun a few days ago.
It turns out that these kind of comets are actually fairly common, but we don't always get such a good video!