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Balloon Flask Workshop: modelling the celestial sphere
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图注： Participants look on a demonstration of how to model the celestial sphere
来源： Organisers of the 4th Chilean Astronomy Education Conference
A Geocentric chart from 1568
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图注： This map, created in 1568 by the Portuguese cartographer Bartolomeu Velho, depicts the worldview of the time, when many scholars believed in a geocentric model of the cosmos — the idea that Earth sits at the centre of the Universe with the Sun, Moon, the five planets known at the time, and stars moving around it. The design and layout of this map were influenced by astronomical understanding rooted in geocentric thinking.
The geocentric model was widely accepted for many centuries, especially in Europe, based on interpretations of celestial motions and philosophical traditions that placed Earth at the centre. It was only later, with observations by astronomers such as, Galileo Galilei, that this model was replaced by the heliocentric model, which places the Sun at the centre of the Solar System.
来源： Bartolomeu Velho
来源链接
词汇表:
地心说 , 科学模型
授权许可： 公共领域 公共领域 图标
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12.99 MB)
Tiruchirappalli Workshop participants and materials December 2024
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图注： Workshop participants showing the paper models they prepared.
来源： OAE Center India
Copernicus's heliocentric system
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图注： Sketch of Copernicus's heliocentric model of the Solar System, from his book "De revolutionibus orbium coelestium" (On the revolution of the heavenly spheres) published in 1543. Shown are the Sun as well as the orbits of Mercury, Venus, the Earth (itself orbited by the Moon), Mars, Jupiter and Saturn. The outermost circle represents the sphere of the stars.
In this model, the Earth is not special – it is merely one planet, among several, orbiting the Sun. This was the first example for what is now known as the Copernican Principle: that our positions as observers in the universe is not special or privileged in any way. The shift from the geocentric to the heliocentric model of our universe is known as the Copernican revolution.
来源： Nicolaus Copernicus
来源链接
词汇表:
哥白尼革命 , 日心模型 , 科学模型 , 哥白尼原理
分类：
太阳系
授权许可： 公共领域 公共领域 图标
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( 图像
702.64 kB)
Partial Lunar Eclipse over southern Portugal
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图注： The image shows a partial lunar eclipse from the 16th of July 2019, taken in southern Portugal. A lunar eclipse happens at full moon so without the eclipse we would see the full lunar disk. Earth’s curved shadow is clearly visible on the left side of the lunar disk. The remaining surface of the Moon is dipped into a deep orange color due. This is because at a lunar eclipse the Earth is positioned between the Moon and the Sun. While the solid part of the Earth creates the shadow we see on the left side of the Moon, sunlight also shines through Earth’s atmosphere. This scatters blue sunlight allowing most red sunlight through, the same process which turns the evening sun into a beautiful and colorful sunset.
来源： ToryYu1989
来源链接
词汇表:
日蚀 , 月偏食
授权许可： CC0 1.0 通用 (CC0 1.0) 公共领域贡献 CC0 1.0 通用 (CC0 1.0) 公共领域贡献 图标
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662.30 kB)
