Scientists in Stevenage are celebrating the successful launch of the most powerful space telescope ever built.
Gaia will travel four times the distance of the moon to map the precise positions and distances of a billion stars.
The European Space Agency's five year mission will help scientists understand how the Milky Way galaxy is built up.
Much of the work on the satellite was carried out at Astrium in Stevenage.
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Rain this evening with showers expected tomorrow and minimum temperatures overnight of 9 deg C 9 66 deg F)
Early fog will clear to leave a dry day with sunny spells and highs of 18 deg C (64 deg F)
Overnight there'll be mist and fog but it will clear for Sunday leaving sunny spells.