Galileo Galilei and the property of naming light spots.

Vainu Bappu Memorial Lecture: What is a sunspot?

Sunspots have been known in the West since Galileo Galilei and Thomas Harriot first used telescopes to observe the Sun nearly four centuries ago; they have been known to the Chinese for more than two thousand years. They appear as relatively dark patches on the surface of the Sun, and are caused by concentrations of magnetism which impede the flow of heat from deep inside the Sun up to its othe...

The Gravity Environment in Space Experiments

In 1687, Isaac Newton (1642 – 1727) produced his famous and important work Principia , based on the experiments and analyses of Galileo Galilei (1564 – 1642). In this work he proposed three main laws. The fi rst was the law of inertia . He used the term inertia for the property of matter that causes it to resist a change in its state of motion. Inertia of an object must be overcome to set it in...

Chapter 43 - Volcanism on Io

differentiation The process by which planets and satellites develop layers or zones of different chemical and mineralogical composition. flyby Term used to describe the close approach of a spacecraft to a body, without the spacecraft going into orbit around that body. Galilean satellites The four largest satellites of Jupiter (Io, Europa, Ganymede, Callisto), named after their discoverer Galile...

University of Pisa The School of Graduate Studies in Basic Sciences ”GALILEO GALILEI” Researches on Non-standard Optics for Advanced Gravitational Waves Interferometers.

The Early Years of String Theory: a Personal Perspective

This article surveys some of the highlights in the development of string theory through the first superstring revolution in 1984. The emphasis is on topics in which the author was involved. Based on a lecture presented on June 20, 2007 at the Galileo Galilei Institute