Readers were tasked with looking for creative ways to photograph shadows for the latest photo challenge. A thoughtfully placed shadow can be used as a compositional device or to add drama to your ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

Supercomputer simulations are helping scientists sharpen their understanding about the environment beyond a black hole’s ‘shadow,’ material just outside its event horizon. The first black hole images ...