Astronauts and robots exploring the moon's surface will only be a text message away after the full system - which will be similar to the Inmarsat, seen here in a mock-up, network on Earth - goes live later this century.
The satellite system should ensure a full four-bar signal for lunar colonists living in the base Nasa wants to build at the south pole of the moon after 2020.
Photo credit: BAE Systems







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1. GALLEY SLAVE#41
Is nowhere safe from these inane ring tones.
I wonder what the roaming charge is!!!
ASTONOMICAL I expect.