Todayâs free vector is a beautiful Christmas globe with a wispy glow, reflecting the surrounding lights. How itâs made: the sphere effect is an eccentric radial gradient and the glow is a âringâ shape with a gradient fill (black at 0%, 80% and 100% and light yellow at 90%) set on âScreenâ transparency mode.
This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:"
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html