Where does the sky end?

Where is the border between sky and space? That's what 5-year-old Matthias of Durham, New Hampshire wants to know. Alesandra, 3 of Bella Vista, Arkansas wants to know why we can't hold air. In this episode from 2020, we’re joined by anthropologist Hugh Raffles, a professor at The New School, and by astronomer John O'Meara, chief scientist at theKeck Observatory (keckobservatory.org). And we have special scoring by cellistZoë Keating (zoekeating.com).
Download our learning guides:PDF (vpr.org/sites/vpr/files/202009/where_does_the_…) |Google Slide (docs.google.com/presentation/d/18WcbtMGjb76wTb…) |Transcript (vpr.org/sites/vpr/files/202010/But-Why-119-Sky…)