Earth as a cosmic matter
Earth as a cosmic matter. The Solar System Desk or round shape? Elliptical orbits? The Sun-Centre of the Universe? Heliocentric system Gravitation Mikulas.
Dec 22, 2015
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Earth as a cosmic matter
The Solar System
Desk or round shape?Elliptical orbits?
The Sun-Centre of the Universe?
Heliocentric system Gravitation
Mikulas Kopernik Johannes Kepler
Issac Newton
Different Climatic Zones
About 4.75 billion years ago…
…out of solar nebula
Weight: 80 times smallerDistance:60 times Earth’s radius
Important sunlight
Ocean tides
Earth’s rotation around the Sun
The Sun
The orbital speed: 30km/sec
The length: 940mil.kmThe time: 365days 5hours 48min 45.7sec = 1sidereal year
Earth’s rotation around its axis
Time of rotation: 23 hours 56 minutes 4.091 seconds= 1 sidereal/astral day
The cause of the seasons is that the rotation axis is not perpendicularto its orbital plane, but makes anangle about 23.44 degrees.
Diagram of the Earth's seasons as seen from the north. Far right: December solstice
Diagram of the Earth's seasons as seen from the south. Far left: June solstice
Time zones
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