Observably

Adverb

1. To a detectable degree, sufficient to be observed.

   "As the planet orbits the star, it causes a wobble in the star's motion, which can be detected as a small but observably large Doppler effect."

2. In an observable manner.

   "From the point of view of earth-based observatories, the effect of the planet's orbit around the star is that the star observably wobbles."

3. Indicates that the proposition can be verified by observation.

   "Observably, the star wobbles."