Equipped with his five senses, man explores the universe around him and calls the adventure Science. At the last dim horizon, we search among ghostly errors of observations for landmarks that are scarcely more substantial. The search will continue. The urge is older than history. It is not satisfied and it will not be oppressed. The history of astronomy is a history of receding horizons.
—Edwin Hubble
(Source: dailygalaxy.com)
