Science

"Hundreds of years ago, people considered comets bad omens. Today, scientists know these icy bodies as time capsules of the ancient solar system. Some astronomers believe comets brought water and organic compounds — aka the building blocks of life — to early Earth.....

Along with their trails of dust, comets also drag plasma, sometimes bluish in color, across the sky. The plasma tail, which looks a bit like Harry Potter's lightning bolt scar in Bartlett's photo, is composed of ionized gas molecules. These charged particles are easily influenced by changes in the sun's activity, said Henry Hsieh, a Planetary Science Institute researcher."

Interesting coincidence that I'm watching John Williams conduct his music from Harry Potter in Berlin on PBS!!