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 to: astronomycast.com/podcast.xml with your podcatching software.
“Planetary Motion in the Sky” on the Astronomy Cast website, with shownotes and transcript.
And the podcast is also available as a video, as Fraser and Pamela now record Astronomy Cast as part of a Google+ Hangout:
When I heard about this I felt an amused twinge of envy. Over the last…
The Hubble Space Telescope has gone through its share of gyroscopes in its 34-year history…
Any event in the cosmos generates gravitational waves, the bigger the event, the more disturbance.…
During the Space Race, scientists in both the United States and the Soviet Union investigated…
The Milky Way has a missing pulsar problem in its core. Astronomers have tried to…
Space travel and exploration was never going to be easy. Failures are sadly all too…