The Museo Galileo in Florence (museogalileo.it) and the British Library have put every sketch online for free.
Start with the simulator to appreciate the challenge, then explore Galileo’s original sketches, then request a live image of Jupiter. You’ll walk away with something rare — a deep understanding of the very moment humanity realized we weren’t the center of everything. galileos viewer online
By [Your Name]
Websites like Slooh or Virtual Telescope Project let you control real robotic telescopes from your browser for free (or via a small membership). The Museo Galileo in Florence (museogalileo