My Travel, Science, Musings Blog https://validator.w3.org/feed/docs/rss2.html Why it is well worth visiting Delft Netherlands Why it is well worth visiting Parma Italy BLOG China, Tariffs, and the U.S. Trade Imbalance Why you should spend Christmas and New Years in Florence Italy 12 Great things to do in Perugia Italy 12 great things to do in Verona, Italy How to calculate the mass of the sun How to calculate the radius of the earth Walking the Montalceto path near Siena Italy How to calculate the mass of the earth How to calculate the distance between the earth and the moon How to calculate the radius of the sun How to calculate the radii of the planets How to calculate the radius of the moon Cyclic Big Bang (and multiple universes) What major monuments to see in the Roman Forum CONTACT ABOUT HOME