Oxygen in Earth's upper atmosphere is leaking into the "Cusp" – a narrow gap in Earth's magnetic field found near the North and South magnetic poles – and scientists are trying to figure out why. See the mysteries of the Cusp in our Video of the Week selection entitled "Launching Rockets Through the Leak in Earth's Atmosphere". Plus, what's in the sky this weekend, questions from listeners and the weekend aurora forecast for Northern Canada and Alaska!

Episode 12 Sources & Resources

NASA: On the Cusp of Understanding

Video of the Week: Launching Rockets Through the Leak in Earth's Atmosphere

The all-new Kp3 Podcast on Astronomynorth.com explores the frontiers of geospace and all things aurora. Hosted by James Pugsley, Kp3 features weekend aurora forecasts for Northern Canada and Alaska, solar cycle and geomagnetic storm updates, app reviews, media alerts, photography, special guests and all sorts of conversations about the nature, culture and wonder of Canada's northern sky.