Galileo used the newly invented telescope to persuade people that the moon was not a perfectly smooth sphere, as all celestial objects were believed to be at that time, but had mountains and valleys and craters that made it seem just like the Earth. This caused considerable consternation at that time with some denying what they saw, saying that it was the telescope that was creating those blemishes.
An amateur astronomer set up a powerful but portable telescope at various locations in Los Angeles and invited people to look at the moon through it. Their sense of surprise and wonder is lovely to see. Some cannot believe that the moon they take for granted is so amazing. We need to take science to the streets like this.