With the unit of light-years, we can begin to make sense of the very great distances between objects in the universe ... which plans to sample a comet and an interstellar dust stream and return ...

Object visualization may be mediated by light or electron beams using optical ... probe that measures one of a wide range of different sample characteristics. The formation of dislocations upon ...

So let’s bring the light back…Light can travel through air, and water, and even some solid objects… Seymour: like this glass of water! Albert: We call these objects transparent. But some ...