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In February 1990, Nasa space probe Voyager took a famous photo of Earth as it left the Solar System.

Seen from six billion kilometres away, our planet appears as a mere dot lit up by the sun, giving a sense of humanity's small place in the universe.

In 2020, Darryl Morris spoke to Nasa planetary scientist Candice Hansen, who worked on the Voyager programme. A Made in Manchester production for 麻豆视频AV World Service.

(Photo: Earth - a pale blue dot. Credit: Nasa/JPL-Caltech)