Season 1 · Episode 2
Orb: On the Movements of the Earth · S1E2
Aired on October 12, 2024
Science entries in this episode
Ptolemy's geocentric model
Before heliocentrism, the Earth sat at the center of the world. We explain Ptolemy's geocentric model, its epicycles, and why it lasted over a thousand years.
Heliocentrism
Hubert defends a forbidden idea in Orb: the Sun at the center, the Earth turning. We explain heliocentrism, its history, and why it caused such an uproar.
The constellation Orion
Orion's Belt is a clue in Orb, centered on the star Alnilam. We explain this constellation, its three aligned stars and how to spot it.
The relativity of motion
Rafal grasps it by stumbling in Orb: if I am the one moving, the still scenery seems to move. We explain the relativity of motion.