What precedent did Galileo's lunar discovery establish for future telescopic observations?

Answer

It established a precedent that future observations would continue to dismantle the ancient separation between the 'lower' world and the 'higher' heavens.

The finding established a strong precedent that future telescopic confirmations, like observing sunspots or Venus's phases, would continue to dismantle the ancient separation between the terrestrial and celestial.

What precedent did Galileo's lunar discovery establish for future telescopic observations?
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