The outstanding feature, however, is the possibility that the velocity-distance relation may represent the de Sitter effect, and hence that numerical data may be introduced into discussions of the general curvature of space.

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

Not until the empirical resources are exhausted, need we pass on to the dreamy realms of speculation.

I knew that even if I were second or third rate, it was astronomy that mattered.

Past time is finite, future time is infinite.

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

The history of astronomy is a history of receding horizons.