Using one spacecraft to block the Sun and another to observe, the pair will fly in tandem with millimeter-level precision.

The ISRO has rescheduled the launch of PSLV-C59 to Thursday due to an "anomaly" detected in the PROBA-3 spacecraft, the agency announced on Wednesday, minutes before the scheduled launch

ESA has launched three other Proba missions thus far, with one currently observing the Sun. Proba-2 launched in 2009, and was originally meant to spend two years in a Sun-synchronous low Earth orbit but is still going more than 15 years later.

India’s ISRO launches two European satellites Live from Sriharikota, India, as the Indian Space Research Organization is set to launch European Space Agency ESA’s two PROBA-3 satellites, named Coronograph and Occulter,

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The Indian Space Research Organisation (ISRO) is all set to launch the European Space Agency (ESA)’s much-awaited mission Proba-3. Proba-3 will deploy two spacecraft to form artificial solar eclipses on demand.

On December 4, India and the European Space Agency (ESA) will launch Proba-3, the world's first precision formation-flying mission, to study the Sun's corona by simulating an artificial eclipse.