ALTV Channel 4 – Leransmall: Social Studies “Galileo Galilei”

The important works and discoveries of Galileo are as follows:

Law of falling objects

In 1604 Galileo discovered The law of falling objects is the law that…Explains 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 debunks the traditional belief that heavy objects fall to Earth faster than light objects.

Laws of pendulum swing (pendulum)

Galileo discovered that when a pendulum is tied to one end of a string and the other end of the string is pulled tightly, it causes the pendulum to swing. By oscillation period (a period) It will depend on the length of the rope. It has nothing to do with the weight of the pendulum. This discovery led to the invention of the pendulum clock in 1656.

Development of the telescope (Galilean telescope)

In 1609, Galileo developed his first telescope. of reusing endoscopes it is as common as “Galilean telescope or “Galilean Telescope” It looks like a refracting telescope. It consists of two types of lenses: a convex lens that collects light from objects. A concave lens works to magnify distant objects.

The Galilean Telescope is the first telescope in the world used to observe celestial bodies. Leading to a new understanding of the universe. It debunks traditional beliefs about astronomy dating back to ancient Greece. Gallio also published the results of his first survey of the sky in 1610 in a book entitled Siderius Nuncius It contains astronomical phenomena 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.

Discovery of Jupiter's four moons

Year 1610 Galileo's discoveryThey are also called the four moons of Jupiter The glorious moon together with IO (IO) Europa (Europe) Ganymede (Ganymede) Callisto (Callisto) This discovery is proof of this.The Earth is not the center of the universe. But it is one of the only planets that revolves around the sun like the other planets.

Discovery of Saturn's rings

1610 Galileo was the first person to view Saturn's rings using a telescope. He knew her as“Saturn's handle” or “Saturn's moons” Until 1655 Christian Huygens A Dutch scientist has clarified that Saturn's handle is actually Saturn's rings composed of a solid material that makes an angle of inclination to the plane of the ecliptic.

Sunspots

In 1612, Galileo observed sunspots, which are areas on the Sun's surface that are cooler than the surrounding surface, causing them to appear as black spots. It is evidence that Aristotle's belief that all celestial bodies are perfect is not correct.

Discover the Milky Way

Originally, humans thought the Milky Way was just a cloud of fog beneath Earth's atmosphere. Until Galileo discovered that the Milky Way was actually a densely distributed collection of stars. Even if viewed from the ground, it looks like a cloud of fog.

Watch additional knowledge about world history in the program Intensive classes from Mathayom 3 to Mathayom 4 road www.ALTV.tv/TutorM4 (click)

pointing to:

National Institute for Astronomical Research (public organization), Thai Astronomical Society