Episode 3
On the final night of their astronomical adventure, Brian and Dara discuss meteors, comets and asteroids and discover what they reveal about the origins of life on Earth.
On the final night of their astronomical adventure, Brian and Dara discuss meteors, comets and asteroids and reveal how studying them reveals information about the origins of life on Earth. Meanwhile, Liz Bonnin meets the NASA team tasked with tracking any space objects on a collision course with Earth. The results of the experiment carried out by the Stargazing viewers - to explore an uncharted area on the surface of Mars - are also revealed.
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Space debris danger
Duration: 02:59
How do telescopes work?
Do you know the differences between refractor, reflector and radio telescopes?
Find out about the principles behind each in this illustrated guide.
Astro audio slideshow
Watch on BBC Science
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Astronomy through social media
Web producer Simon Mackie writes about life on location for the Stargazing web team, and how they use Twitter, Flickr, live web chats and citizen science to engage with the audience at home.
Credits
| Role | Contributor |
|---|---|
| Presenter | Brian Cox |
| Presenter | Dara O Briain |
| Reporter | Liz Bonnin |
| Series Producer | Alan Holland |
| Executive Producer | Helen Thomas |
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