Originally Posted by thepolyparrot
It's block #2983 in Barbara Brackman's BlockBase
Apparently first attributed to Nancy Page designs.
Note that in the directions it says "Nancy suggests", so this may be Nancy Page!
Although the block was probably originally designed for hand piecing, it could be machine pieced by first assembling the four beams of light. Then add the two plain triangles to each, stitch to the center square, then sew the four-patch seams.