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Episode 3

Stargazing Live, Series 3 Episode 5 of 6

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.

Release date:

59 minutes

Last on

Sat 12 Jan 2013 18:00

How do telescopes work?

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

Astro audio slideshow
Astronomer Mark Thompson handpicks his favourite space pictures from the Stargazing Live Flickr group.

Watch on BBC Science

Follow @BBCStargazing

Follow @BBCStargazing
News, event details and behind-the-scene photos from the Stargazing LIVE production team. 

Follow @BBCStargazing on Twitter

Astronomy through social media

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.


Role Contributor
PresenterBrian Cox
PresenterDara O Briain
ReporterLiz Bonnin
Series ProducerAlan Holland
Executive ProducerHelen Thomas

See the International Space Station

International Space Station (NASA)

Find out when you can spot the ISS – Tim's on board!

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Stargazing Live photo group

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Tim Peake's Principia mission

Tim Peake and his Principia mission badge

Find out about Tim's mission and how to get involved