On the final night of their astronomical adventure, Professor Brian Cox and Dara O Briain discuss aliens, extra terrestrial life and the hunt for new worlds far outside our solar system. They also find out if they’ve been successful in their quest to find their own Stargazing planet.
Meanwhile, Mark Thompson attempts to tackle light pollution by getting the entire population of a small town to switch off all of their lights.
The third and final episode of Stargazing LIVE will air Wednesday 18th January at 20:00 on BBC Two.
Get closer to the stars with The Open University
If you've really enjoyed the Stargazing Live experience, you might like The Open University's brand-new short course, Galaxies, Stars And Planets.
Visit our main Stargazing LIVE page to explore the story of the Universe with our interactives, and examine meteorites up close. Also enjoy free learning materials about the Moon and more.
Want to know more about SuperWASP?
The SuperWASP search for 'hidden' planets was featured in the third programme. Here's some background on that project: