Until the 1990s, there were few reliable observations about movement at the scale of the entire universe, which is the only scale dark energy effects. So dark energy could not be seen until we could measure things very, very far away.
Related Keywords: Dark Energy Far Away Movement Measure Things Away
Related Authors: Leonardo da Vinci Stephen Hawking Isaac Newton Galileo Galilei Rene Descartes Nicolaus Copernicus Omar Khayyam
