The sun is getting more active than it has for a decade — and it could lead to power outages, grounded flights, and stunning auroras

• The sun is entering a period of peak activity that will last several years, an expert said.
• This means the sun will produce more solar flares, powerful bursts of energy.
• Solar flares can disrupt radio communications and electric power grids on Earth.

The sun is waking up after almost a decade of relative calm, scientists say — and that could cause problems on Earth.