If we look back into the geologic record of the Earth, it appears that our planet’s magnetic field flips polarity every few hundred thousand years or so. Why does this happen? When’s it supposed to happen next? Is it dangerous?
We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30 pm Eastern / 21:30 PM UTC (9:30 GMT). You can watch us live on AstronomyCast, or the AstronomyCast YouTube page.
If you would like to join the Weekly Space Hangout Crew, visit their site here and sign up. They’re a great team who can help you join our online discussions!
If you’d like to join Fraser and Paul Matt Sutter on their tour to Iceland in February, 2018, you can find the information at astrotouring.com.
We are getting very excited for the AstronomyCast Solar Eclipse Escape, where you can meet Fraser and Pamela, plus WSH Crew and other fans. Right now we’re at capacity, but you can join the waiting list in case spaces open up by emailing us at firstname.lastname@example.org with Eclipse Waiting List in the subject line!
This episode is sponsored by: Barkbox
Show notes here
Transcription services provided by: GMR Transcription