This is Johannes Kepler in a letter he wrote in 1610 telling Galileo that they need to do more telescopic observations of the Moon and Jupiter before spacecraft missions start visiting those planets. Yep, this conversation actually 1610 🤯


· Mastodon Twitter Crossposter · 0 · 0 · 1
Sign in to participate in the conversation

The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!