While a cosmic distance ladder sounds like fun, it is actually the name given to the variety of methods astronomers use to determine the distance to objects in space. This video examines the method of determining the distance of a star...

Are there more stars in the universe than grains of sand in the sea? This video looks at the way scientists attempt to answer this question by using data from NASA and focusing on observable space.

Part one of this short two-part series begins with a review of Einstein's theories and what they mean to the world as we know it. This clip delves into the "Beyond Einstein" program which NASA created to further Einstein's theories. This...