# Astronomy and space

1,203 courses and talks.

- [Aspects of gravity and field theory in cosmology (part 1)](https://invisiblenetwork.ai/learn/cern/3021937): Victor Gorbenko · CERN
- [Discussion session on positivity in cosmology](https://invisiblenetwork.ai/learn/cern/3010820): CERN
- [A ghost and a naked singularity: facing our demons](https://invisiblenetwork.ai/learn/cern/3001844): Bob Holdom · CERN