Observations Always Involve Theory.

Science Is The One Human Activity That Is Truly Progressive. The Body Of Positive Knowledge Is Transmitted From Generation To Generation.

With Increasing Distance, Our Knowledge Fades, And Fades Rapidly. Eventually, We Reach The Dim Boundary-the Utmost Limits Of Our Telescopes. There, We Measure Shadows, And We Search Among Ghostly Errors Of Measurement For Landmarks That Are Scarcely More Substantial. The Search Will Continue. Not Until The Empirical Resources Are Exhausted, Need We Pass On To The Dreamy Realms Of Speculation.

Past Time Is Finite, Future Time Is Infinite.

Equipped With Our Five Senses - Along With Telescopes And Microscopes And Mass Spectrometers And Seismographs And Magnetometers And Particle Accelerators And Detectors Sensitive To The Entire Electromagnetic Spectrum - We Explore The Universe Around Us And Call The Adventure Science.

The History Of Astronomy Is A History Of Receding Horizons.