Equipped with his five senses, man explores the universe around him and calls the adventure Science.

There we measure shadows, and we search among ghostly errors of measurement for landmarks that are scarcely more substantial.

The great spirals... apparently lie outside our stellar system.

The history of astronomy is a history of receding horizons.

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.

Equipped with his five senses, man explores the universe around him and calls the adventure Science.

Wisdom cannot be directly transmitted, and does not readily accumulate through the ages.