文档与资源 - 搜索结果
搜索结果
Balloon Flask Workshop: modelling the celestial sphere
图像
图注： Participants look on a demonstration of how to model the celestial sphere
来源： Organisers of the 4th Chilean Astronomy Education Conference
Tiruchirappalli Workshop participants and materials December 2024
图像
图注： Workshop participants showing the paper models they prepared.
来源： OAE Center India
Copernicus's heliocentric system
图像
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 , 哥白尼原理
分类：
太阳系
授权许可： 公共领域 公共领域 图标
文件
( 图像
702.64 kB)
Herschel’s view of new stars and molecular clouds
图像
图注： This image shows the Westerhout 3, 4 and 5 star formation regions. This area has huge amounts of gas and dust. This gas and dust hides the physical processes going on in this region from studies using visible light. This image was taken in infrared light by the Herschel Space Observatory. This infrared light allowed Herschel to see deep into these star forming regions.
In Westerhout 3, 4 and 5, huge, cold clouds of molecular hydrogen have collapsed into dense knots and filaments. Within these new structures the gas is dense and cold enough for it to collapse and form stars. These new stars give off powerful winds of charged particles, like stronger versions of the solar wind our sun gives off. These winds have combined to blow massive bubbles in the surrounding gas and dust. These are visible as the large darker voids in the image.
来源： ESA/Herschel/NASA/JPL-Caltech; acknowledgement: R. Hurt (JPL-Caltech)
来源链接
词汇表:
红外天文学 , 恒星形成 , 星际介质 , 分子云 , 星风
分类：
银河系与星际介质
, 恒星
授权许可： 知识共享许可协议 Attribution 3.0 IGO 知识共享许可协议 Attribution 3.0 IGO 图标
文件
( 图像
4.53 MB)
The Pillars of Creation in comparison
图像
图注： The 'Pillars of Creation' are a renowned astronomical feature situated within the Eagle Nebula in the Serpens constellation. The illustration provides a direct comparison between images captured by the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST), showcasing the pillars, which span several light years in diameter, in both visible light (also known as optical light) and infrared light. On the left are the pillars as seen by Hubble in visual light, taken in 2014. It displays dark pillars against an opaque background, with only a handful of visible stars. Conversely, the counterpart on the right is Webb’s near-infrared view published in 2022, penetrating the dust and revealing numerous stars of varying sizes.
Their distance from Earth is approximately 6,500 to 7,000 light years. Within these pillars, new stars are constantly forming, making them a subject of extensive study by astronomers. Composed mostly of cool molecular hydrogen and small amounts of interstellar dust, they are subject to erosion by the intense ultraviolet radiation emitted by nearby massive and newborn stars, a process known as photoevaporation.
来源： NASA, ESA, CSA, STScI
来源链接
词汇表:
红外天文学 , 红外望远镜 , 光学天文学 , 恒星形成 , 可见光谱 , 尘埃云
分类：
银河系与星际介质
, 恒星
授权许可： 知识共享许可协议 Attribution 2.0 Generic 知识共享许可协议 Attribution 2.0 Generic 图标
文件
( 图像
12.03 MB)
.png){kind=link}
