During its 23 - minute running time, the film seeks to capture the entire history of the universe by focusing on stars. (scientificamerican.com)
Over the 14 - billion - year history of the universe, gravity has been acting to pull matter together in some places and leave other places more and more empty. (sciencedaily.com)
Because telescopes look back in time as they gather light from far - off stars and galaxies, astronomers can explore the expansion history of the universe by focusing on distant objects. (scientificamerican.com)