Galileo’s important works and discoveries are as follows:
The law of fallen bodies
In 1604 Galileo discovered The law of falling bodies is a lawExplain how objects fall from high places due to the effect of gravity. It can be concluded that objects of different weights always fall to the ground at the same time. It dispels the common belief that heavier objects fall to the ground faster than lighter ones.
Laws of pendulum swing (Pendulum)
Galileo discovered that when a pendulum was attached to one end of a string and the other end of the string was stretched taut, it would cause the pendulum to move. before the time of oscillation (time) It depends on the length of the rope. It has nothing to do with the weight of the crank. This discovery led to the invention of the pendulum clock in 1656.
Develop a telescope (Galilean Telescope)
In 1609, Galileo developed his first telescope. From the reuse of binoculars It is known as “Galilean telescope or “Galilean Telescope” It is like a refracting telescope. Consists of two types of lenses: A convex lens that collects light from objects. and a concave lens that magnifies distant objects.
The Galilean Telescope is the first telescope in the world used to observe celestial objects. which leads to a new understanding of the universe It dispels traditional beliefs about astronomy that go back to ancient Greece. Galio also published the results of his first study of the sky in 1610 in a writing called A star messenger There are astronomical phenomena that he encountered, from the mountainous surface of the moon to the discovery of the Milky Way, to constellations that cannot be seen with the naked eye, etc.
We found 4 moons of Jupiter
Year 1610 Galileo discoveredAlso known as the four moons of Jupiter the moon of Galilee along with IO (IO) Europa (Europa) Ganymede (Ganymede) Callisto (Callisto) This finding is evidence that it is true.The earth is not the center of the universe. But this is one of the planets that orbits the sun like other planets.
Saturn’s rings are discovered
1610 Galileo was the first person to see the rings of Saturn using a telescope. He explained how“Saturn’s Hand” or “Saturn’s Satellites” Until the year 1655 Christian Huygens Dutch scientist It was explained that the hand of Saturn is in reality whether Saturn’s rings are made of solid material Make an angle of inclination to the plane of the ecliptic.
A solar flare
In 1612, Galileo noticed sunspots, which are areas of the sun’s surface that have a lower temperature than the surrounding surface, causing them to appear as black spots. It is evidence that Aristotle’s belief that all heavenly bodies are perfect is not true.
Discover the Milky Way
At first, people thought that the Milky Way was just a cloud of smoke beneath the earth’s atmosphere. Until Galileo discovered that the Milky Way was a dense cluster of stars. So that when viewed from the ground it looks like a cloud of smoke.
Check out additional knowledge Download the program on world history Intensive classroom for Mathayom 3 to Mathayom 4 method www.ALTV.tv/TutorM4 (click)
reference:
National Astronomical Research Institute (Public Body), Thai Astronomical Society
