For the first time in more than a century, a total solar eclipse is coming to mainland Spain with an even longer encore next summer.

Dr. Amir Caspi of the Southwest Research Institute says the upcoming total solar eclipse will provide scientists with a unique opportunity to study the sun.

"We are flying a couple of NASA's WB-57 high altitude research jets,” Dr. Amir Caspi, with the Southwest Research Institute, said. Traveling at 450 mph, scientists from the San Antonio-based SwRI will be chasing the moon’s shadow. With two planes, it will allow for around seven and half minutes underneath the total solar eclipse. "A total eclipse provides a unique opportunity to study the solar corona,” said Caspi. It’s millions of degrees hotter than the solar surface,” Caspi said.