Final answer:
Without the contributions of Galileo, Newton, Brahe, and Copernicus, the scientific revolution might have been delayed, leading to a modern world with less technological advancement and a view of the universe that remained centered around ancient superstitions and religious doctrines.
Step-by-step explanation:
If Galileo, Newton, Brahe, and Copernicus had not expressed their revolutionary scientific ideas, the course of science and our understanding of the universe would have been vastly different. Their work laid the groundwork for the scientific revolution and fundamentally shifted the way humanity perceives the cosmos. Without their contributions, the idea that the Earth was the center of the universe might have persisted, along with other ancient Greek beliefs. Without the heliocentric model and the laws of motion that were eventually accepted, advancements in physics, astronomy, and related technologies could have been delayed or developed along a completely different path.
The courage to challenge old superstitions and embrace a rational view of the world may have been diminished, leaving society more entangled in medieval thought. Also, without the demotion of Earth's status in the universe, humanity might have maintained a more anthropocentric perspective, influencing culture, religion, and philosophy in profound ways. Overall, modern life with its technological advances, scientific methods, and worldviews heavily reliant on these pioneers' discoveries might look significantly altered, perhaps less advanced or more mythical in nature.