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Video

Triple J: Why is Pluto not a planet?

Watch this clip and learn why Pluto was taken off the official list of planets. Dr Karl Kruszelnicki explains the three criteria that must be met before planets can be called planets. What are they?

Video

BTN: Aboriginal astronomy

Many ancient cultures studied the night sky, and we know this because it is reflected in some of the earliest stories we have on record. Learn about one of these stories in this video. Other than the Dreamtime stories, what other evidence might there be that the Aboriginal people studied the stars?

Video

Exoplanets

This nine and a half minute video segment from Catalyst explains that relatively recently times we have got the technology to look for exoplanets. Astronomers have now uncovered more than 350 planets orbiting other stars. These worlds, known as exoplanets, can be pretty weird places. This program discusses a theory to describes ...