On August 21, 2017, millions of Americans will witness the first total solar eclipse to cross the continental United States in 99 years. While hordes of citizens prepare to flock to the eclipse’s path of totality, scientists, too, are staking out spots for a very different reason: to investigate the secrets of the sun’s elusive atmosphere.

A look at NASA's Parker Solar Probe, which launched its mission to explore the sun in August 2018.

Europe and the United States are working together on an unprecedented journey to learn more about the impact of the Sun on our planet, to really know what its atmosphere is like and how it affects our environment; since solar radiation increasingly affects our lives and telecommunications.