Why the total solar eclipse in April could be particularly dramatic. This year's solar eclipse comes at a time when the sun will be particularly active - more active than it has been in two decades.
The active Sun will look very spiky, like a "very irritable little hedgehog," said solar physicist Scott McIntosh. Watch out for the solar wind, a stream of charged particles that is constantly blown into space by the sun’s corona. A strong solar wind heading toward Earth can disrupt our satellite communications and affect our magnetosphere.