universetoday.com
Podcast: Planetary Motions in the Sky - Universe Today
Even the ancient astronomers knew there was something different about the planets. Unlike the rest of the stars, the planets move across the sky, backwards and forwards, round and round. It wasn’t until Copernicus that we finally had a modern notion of what exactly is going on. Click here to download the episode. Or subscribe … Continue reading "Podcast: Planetary Motions in the Sky"