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
航天飛機與孩子們漂浮在裡面
astronomy、brain、converted、craft、government、nasa、science、shuttle、space、Space、spaceship、space shuttle、Space Stuff、usa
天文學、腦、轉換、手藝、政府、上、科學、穿梭、空間、空間、飛船、航天飛機、太空東西、使用
資料來源：openclipart ( https://openclipart.org/ )