“When astronomers get together, they always have something to talk about".
Astronomer Dr Grant Christie joins Graeme Hill to discuss the observable universe, a study into how Mars was made, and what will happen when our sun dies?
Dr Christie explains the observable universe is “the universe in a glance.”
Cosmologists typically assume that our observable universe is just the nearby part of a greater entity known as "the universe" where the same physics applies.
Earth's orbital changes have influenced climate life forms for at least 215 million years, and the Earth was up to 5 percent further away than it normally was.
A new mission to study how Mars was made will look inside the planet rather than the surface. And what will happen when our sun dies?
Listen to the full interview with Dr Grant Christie above.
Weekend Variety Wireless with Graeme Hill, 8pm - midnight Saturdays and Sundays, on RadioLIVE and streaming live to the Rova app on Android and iPhone.