Next week's solar eclipse will be streamed live online for the first time, from the vantage point of helium-filled balloons across the United States.

College of Charleston professor Dr Cassandra Runyon (Centre) releases a balloon during a test launch for the Space Grant Ballooning Project in preparations for Monday's solar eclipse on board a US Coast Guard response boat at sea near Charleston, South Carolina, US Aug 17, 2017. Location coordinates for this image are 32º41' 975" N 79º44'195" W.