A "solar fireworks show" lit up the solar system just in time for the United States' 250th birthday. The sun emitted a strong solar flare on Saturday, which peaked at around 4:41 p.m. ET, NASA said.

Add Yahoo as a preferred source to see more of our stories on Google. A "solar fireworks show" lit up the solar system just in time for the United States' 250th birthday. The sun emitted a strong ...