Solar eclipses are beautiful, but they're a valuable chance to study the Sun's atmosphere as its surface is blocked by the Moon. Now, ESA can generate artificial solar eclipses from space with the Proba-3 mission. The two satellites fly in formation 150 meters apart. One spacecraft occults the Sun, while the other observes the faint solar corona. They can produce a new 6-hour eclipse every 19.6-hour orbit around the Earth. Solar eclipses on demand.
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