Science facts

sarkari rojgar daily March 18, 2021

IT IS CLEAR THAT EARTH DOES NOT MOVE THE GEOCENTRIC MODEL 


One of the most influential of all Western philosophers , Aristotle , from Macedonia in northern Greece , believed that the universe was governed by physical laws . 

He attempted to explain these through deduction , philosophy , and logic Aristotle observed that the positions of the stars appeared to be fixed in relation to each other , and that their brightness never changed .

The constellations always  motion , stayed the same and spun daily around Earth The moon , sun , and planets , too , appeared to move in unchanging orbits around Earth . 

Their he believed , was circular and their speed constant . His observations of the shadow cast by Earth on the moon's surface during a lunar eclipse convinced him that Earth was a sphere . 

IT IS CLEAR THAT EARTH DOES NOT MOVE THE GEOCENTRIC MODEL One of the most influential of all Western philosophers , Aristotle , from Macedonia in northern Greece , believed that the universe was governed by physical laws . He attempted to explain these through deduction , philosophy , and logic Aristotle observed that the positions of the stars appeared to be fixed in relation to each other , and that their brightness never changed . The constellations always motion , stayed the same and spun daily around Earth The moon , sun , and planets , too , appeared to move in unchanging orbits around Earth . Their he believed , was circular and their speed constant . His observations of the shadow cast by Earth on the moon's surface during a lunar eclipse convinced him that Earth was a sphere . His was that a spherical Earth remained stationary in space , never spinning or changing its position , while the cosmos spun eternally around it Earth was an unmoving object at the center of the universe . Aristotle believed that Earth's atmosphere , too , was At the top of the atmosphere friction occurred between the atmospheric gases and the tona rotating sky above . Episodic emanations of gases from volcanoes rose to the top of the atmosphere . Ignited by friction , these gases produced comets , and if ignited quickly , they produced shooting stars . His reasoning remained widely accepted until the 16th century . - In about 130 BCE the Greek astronomer and mathematician Hipparchus of Nicaea noticed that a star named Spica had moved 2 ° east of a point on the celestial sphere , the fall equinox point , compared to its position recorded 150 years earlier . Further research showed him that the positions of all stars had shifted . This shift became known as " precession of the equinoxes . " The celestial sphere is an imaginary sphere surrounding Earth , in which stars are found at specific points . Astronomers use exactly defined points and curves on the surface of this sphere as references for describing the positions of stars and other celestial objects . The sphere has north and south poles , and a celestial equator , which is a circle lying above Earth's equator . The ecliptic is another important circle on the sphere , which traces the apparent path of the sun against the background of stars over the course of the year The ecliptic intersects the celestial equator at two points : the spring and fall equinox points . These mark the positions on the celestial sphere that the sun reaches on the equinoxes in March and September The precession of the equinoxes refers to the gradual drift of these two points relative to star positions . Hipparchus put this precession down to a " wobble " in the movement of the celestial sphere , which he believed to be real and to rotate around Earth . It is now known that the wobble is actually in the orientation of Earth's spin axis , caused by the gravitational influence the sun and the moon ..


His was that a spherical Earth remained stationary in space , never spinning or changing its position , while the cosmos spun eternally around it Earth was an unmoving object at the center of the universe . Aristotle believed that Earth's atmosphere , too , was At the top of the atmosphere friction occurred between the atmospheric gases and the tona rotating sky above . 

Episodic emanations of gases from volcanoes rose to the top of the atmosphere . Ignited by friction , these gases produced comets , and if ignited quickly , they produced shooting stars . His reasoning remained widely accepted until the 16th century . -

THE EOUINOXES MOVE OVER TIME

In about 130 BCE the Greek astronomer and mathematician Hipparchus of Nicaea noticed that a star named Spica had moved 2 ° east of a point on the celestial sphere , the fall equinox point , compared to its position recorded 150 years earlier . Further research showed him that the positions of all stars had shifted . This shift became known as " precession of the equinoxes . " The celestial sphere is an imaginary sphere surrounding Earth , in which stars are found at specific points . 

Astronomers use exactly defined points and curves on the surface of this sphere as references for describing the positions of stars and other celestial objects . The sphere has north and south poles , and a celestial equator , which is a circle lying above Earth's equator . 

The ecliptic is another important circle on the sphere , which traces the apparent path of the sun against the background of stars over the course of the year The ecliptic intersects the celestial equator at two points : the spring and fall equinox points . 

These mark the positions on the celestial sphere that the sun reaches on the equinoxes in March and September The precession of the equinoxes refers to the gradual drift of these two points relative to star positions . Hipparchus put this precession down to a " wobble " in the movement of the celestial sphere , which he believed to be real and to rotate around Earth . 

It is now known that the wobble is actually in the orientation of Earth's spin axis , caused by the gravitational influence the sun and the moon ..

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