The Type II supernova that created the Crab Nebula (image below) was seen by Chinese and Arab astronomers in the year A.D.1054.Because the star is 6,500 light-years away from us,we know the star exploded in the year: 
Definitions:
Adaptive Learning
A teaching method that uses technology and algorithms to customize learning materials and activities to the needs of individual learners.
Educational Materials
Educational materials are resources such as textbooks, videos, software, and other tools that support learning and teaching in an academic or training context.
Computer Software Programs
Computer software programs are sequences of instructions for computers to perform specific tasks, ranging from operating systems to application software.
Three-Point Basketball Shots
A field goal in basketball made from beyond the three-point line, a designated arc surrounding the basket.
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