This red supergiant star [V838] monocerotis is located about 20,000 light-years from Earth. A burst of light in a huge dust cloud caused light echos that were seen for three years. Credit: NASA, ESA and H.E. Bond [STScI].
Plasma Ball Physics
A plasma ball is fun, but plasmas are an important part of our physical universe. From lightning to stars to the Northern Lights, plasmas are all around us.