19 June: 24 Hours on the International Space Station

The International Space Station (ISS) - which celebrates its 20th anniversary in November 2018 - is without doubt the most ambitious orbital project ever built.

This giant assemblage covering some 9,700m2 has allowed men and women to prepare for long periods of weightlessness, as a precursor to possible trips to Mars.

It has also allowed people from around the world to live and work together, with no fewer than 16 nations having participated in the construction of this steel behemoth weighing 400 tonnes. This film takes us inside the International Space Station.

Tuesday at 00.25 on TG4.

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