“The ISEE-3 spacecraft was launched by NASA in 1978 to study the the interaction between the Earth’s magnetic field and the solar wind and was operated up to the year 1997. In 2014 it was discovered that the probe wasn’t deactivated and was emitting radio signals. A group of Citizen Scientists crowdfunded the ISEE-3 reboot project, earning enough money to buy and build equipment to reestablish contact and take control of the spacecraft.”
More at LEGOtomy.