- Kepler predicted that Venus' diameter is almost a quarter of the Sun's diameter, so Mercury should have a tenth of the Sun's diameter. Pierre Gassendi saw the true size of Mercury in 1631 during its transit across the Sun, and was surprised by how small it was as it looked like a sunspot https://epl.carnegiescience.edu/news/mercury-transit-history-and-future-measuring-transits#:~:text=Thus%20Pierre%20Gassendi%2C%20along%20with,planet%20compared%20to%20the%20Sun. 18 comments space
- New modelling shows new method of creating early earth water https://epl.carnegiescience.edu/how-did-earth-get-its-water-0 3 comments science