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The Billion Pixel Camera
The Milky Way, our galaxy, is a magnificent sight in the night sky, but we know surprisingly little about it for certain. What is its shape? How many stars does it actually contain? What lies at its centre? The Gaia space telescope will answer these questions, being armed with the most advanced camera to leave our planet, and it will allow us to see our galaxy as we've never seen it before. The Sky at Night visits the factory in Chelmsford that made the astonishing sensor at the heart of the mission.
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Other episodes for this season
![The Billion Pixel Camera](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![What Have UFOs Done for Us?](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Hubble: The Five Greatest Images of the Cosmos](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Venus, Earth's Twin](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Rosetta Update - A Comet's Story](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Pluto Revealed](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Cosmic Blasts](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Playing With a Clockwork Universe](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Volcanoes of the Solar System](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![Second Earth?](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)
![The Real Star of Bethlehem: A Christmas Special](https://image.tmdb.org/t/p/w300/LW2mv9LyXFAuIX7S86I7wtaoQE.jpg)