Sun, 25 January 2015
Feature Guests: Aaron Sigut and Carol Jones
Disks are ubiquitous in our universe. They are found in the spiral arms of galaxies. They are found among new and old stars, whether in the protoplanetary gas associated with stellar births or the black holes which follow many stellar deaths.
Today we have a special treat. I’m excited to be joined by both Carol Jones and Aaron Sigut here at The Star Spot for the first of a special two-part series. We’ll find out why disks are such common features of our universe, and how they figure prominently into a mysterious phenomenon known as B emission stars, which are among the hottest, most energetic and most mysterious of stellar phenomena.
Current in Space
Dave reports the probability of exoplanet habitability may have just increased significantly with scientists rethinking the once assumed life-preventing effect of planetary tidal locking. Then Laura explains the famous Pillars of Creation in the Eagle Nebula seem to be eroding away, and may have already vanished. Anuj shares new evidence that the asteroid which wiped out the dinosaurs was a truly global event. And has Beagle 2 been resurrected? Celine with new images from Mars that are shining light on the tragic fate of a spacecraft whose trip was no more smooth than that of its namesake.
About Our Guest
Today two distinguished astronomy scholars from Western University are joining us here at The Star Spot. Dr. Carol Jones is Associate Dean of Graduate and Postdoctoral Studies in the Faculty of Science. Aaron Sigut is Associate Professor of Astronomy in the Physics and Astronomy Department. They both share research interests in circumstellar disks around hot stars, which we will get into in a series of conversations with both academics.
Direct download: TheStarSpot-Episode69-Dynamic_Stars_and_Ubiquitous_Disks-Part1.mp3
Category:general -- posted at: 9:00pm EST
Sun, 11 January 2015
Feature Guest: Jayanne English
We've all been blown away by those jaw dropping majestic images of the cvosmos. But would you feel deceived to know that few of those images show what the eye would truly see? Today guest host Dave Kirsch welcomes Professor Jayanne English at The Star Spot to discuss the tension between art and science in astronomy.
Current in Space
Dave alerts us to the likelihood of future collisions between our sun and its nearby stellar neighbours, explaing why a near miss can still make a big impact. The debate about the status of Pluto is sure to heat up as Tony reports on the New Horizons mission which recently came out of hibernation in preparation for its final approach to the dward planet. And Anuj shares new insights into the cause of mysterious high altitude aurora.
About Our Guest
Jayanne English is Professor in the department of Physics and Astronomy at the University of Manitoba. Her interests are in the origin of structure in galaxies, including galactic halos. She held a post-doctoral position at the Space Telescope Science Institute and was Visitor at Oxford University (2013) and Visiting Scholar at the Australian National University (2009). She is also highly involved in merging the arts and the sciences through astronomical imagery. Professor English led an interactive art project in honour of the Internal year of Astronomy entitled Seeing is Believing.