Despite widespread reliance on the system, there is no universal plan to deal with GPS disruption.
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Tim Harford
Presenter, 50 Things That Made the Modern Economy
Galileo project
Jonathan Amos
BBC Science Correspondent
"Europe's GPS" remains offline as it grapples with a technical glitch in its ground infrastructure.
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US space agency Nasa says salt found on one of Jupiter's moons, Europa, could be a sign of extra-terrestrial life.
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Jonathan Amos
BBC Science Correspondent
One of the UK's most successful space entrepreneurs says Brexit will do immense harm to industry.
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Sam Gyimah says the row over the EU's Galileo system shows how the UK will be "hammered" in any deal.
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Laura Kuenssberg
Political editor
As another minister resigns, it is becoming increasingly difficult for Theresa May's Brexit deal.
Read moreChief Executive of the UK Space Agency, Graham Turnock, on Brexit and the Galileo satellite project.
Pratik Jakhar
BBC Monitoring
China's Beidou is being used in everything from ploughing to precision missiles, but can it go global?
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Jonathan Amos
BBC Science Correspondent
UK ministers set aside £92m to study the feasibility of a sovereign satellite-navigation system.
Read moreThe UK's own satellite navigation system project is to get a £92m boost, an official tells the BBC.
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