Looking Back in Time

Astronomers are getting better at peering back to the very beginning of the universe. The destination: Way out there and the time frame: 13.5 billion years back. Scientists are looking for the first formation of stars and galaxies and the old saying comes to mind, what came first, the chicken or the egg. This will tell us about the era of time not long after the big bang, but can we actually identify the exact location where the big bang took place? We’re not quite there yet. Also, another moon was discovered that might have liquid or frozen water and scientists are learning more about the atmosphere on Pluto. And don’t miss what’s in the night sky this week. All this and more on this week’s Sky Talk.Don’t forget the Philadelphia Science Festival is still going on — events can be found at philasciencefestival.org.[audio: st20110425.mp3]