Artificial solar eclipses to help scientists catch a rare glimpse of the Sun’s mysterious atmosphere
India on Thursday successfully launched into space a pair of European satellites that will create artificial solar eclipses to help scientists catch a rare glimpse of the Sun’s mysterious atmosphere.
Scientists broke into rapturous applause at the Sriharikota launch site as the Indian Space Research Organisation (ISRO) chief announced the spacecraft had been ejected as planned.
“The spacecraft has been placed in the right orbit,” ISRO chief S. Somanath said.
The launch, originally scheduled for Wednesday but delayed by a technical fault, was for the European Space Agency’s “Project for On-Board Autonomy 3” (Proba-3) mission, part of a series of “in-orbit missions to test out new technologies”.
The mission, at a cost of 200 million euros ($211 million), creates artificial total solar eclipses by positioning two satellites 150 metres (500 feet) apart from each other.
The shadow cast by one satellite allows the other to observe solar phenomena while blocking out the light from the Sun itself.
“For six hours at a time, it will be able to see the Sun’s faint atmosphere, the corona, in the hard-to-observe region between the Sun’s edge and 1.4 million kilometres from its surface,” the European Space Agency said in a pre-launch analysis.
The project will help scientists answer key questions, including why the corona is so much hotter than the Sun itself, and how the Sun’s energy output changes over time.
Source : https://www.ibtimes.com/atrificial-eclipse-satellites-launched-3754203