A Coronal Mass Ejection

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图注： A burst of solar material can be seen erupting from the Sun in this view, illustrating a coronal mass ejection (CME)—a large eruption of plasma and magnetic field from the Sun’s outer atmosphere, or corona. These CMEs are caused by magnetic explosions in the Sun's corona. During a CME, huge amounts of electrically charged particles are launched into space at great speeds, carrying part of the Sun’s magnetic field with them. These events are driven by changes in the Sun’s magnetic structure and release vast clouds of hot gas that travel outward into the solar system. When a CME moves through space, it can interact with a planet’s magnetic field and atmosphere, sometimes creating spectacular auroras or, in strong cases, interfering with artificial satellites and power systems. CMEs are often associated with a temporary brightening of the region of the Sun where the CME originated. This is known as a solar flare. Stars other than the Sun can also have CMEs and flares. This image was taken by NASA's Solar Dynamics Observatory (SDO). This is a space mission to monitor the Sun. The image here is taken at a special wavelength which partially ionised helium emits strongly at.
来源： NASA/Goddard/SDO
来源链接

词汇表: 太阳 , 日冕物质抛射（CME）

授权许可： 公共领域 公共领域 图标

文件 ( 图像 596.22 kB)

The Crab Nebula

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图注： The Crab Nebula is situated 6500 light years away in the constellation Taurus. This is remnant of a supernova explosion caused by a massive star at the end of its life. This happened several thousand years ago but the light from this explosion only reached the Earth in the year 1054. This celestial event was viewed by people across the world with many different societies noting it in their records. The force of the supernova explosion has pushed pushed the outer layers of the star out into the surrounding gas. Here we see this as the bubbly orange structure as the force of the explosions ploughs into the surrounding gas. At its heart lies the Crab Nebula Pulsar, a neutron star that is the remains of the exploded star. This neutron star has a strong magnetic field. Electrons in nebula dance in this magnetic field, emitting the diffuse blue light we see inside the orange bubble.
来源： NASA, ESA, J. Hester and A. Loll (Arizona State University)
来源链接

词汇表: 超新星遗迹
分类： 银河系与星际介质 , 恒星

授权许可： 公共领域 公共领域 图标

文件 ( 图像 24.55 MB)

Herschel’s view of new stars and molecular clouds

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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)

Solar absorption lines

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图注： This is a high resolution spectrum of light from our Sun showing visible region of the electromagnetic spectrum. The absorption lines are visible clearly as narrow black regions. The visualization shown here was created to mimic a so-called echelle spectrum, with wavelength increasing from left to right along each strip, and from bottom to top. Each of the 50 horizontal strips covers 6 nanometers, for a complete spectrum across the visible range from 400 to 700 nanometers. This spectrum was created from a digital atlas observed with the Fourier Transform Spectrometer at the McMath-Pierce Solar Facility at the National Solar Observatory on Kitt Peak, near Tucson, Arizona (‘Solar Flux Atlas from 296 to 1300 nm" by Robert L. Kurucz, Ingemar Furenlid, James Brault, and Larry Testerman: National Solar Observatory Atlas No. 1, June 1984). Note: NSO/Kitt Peak FTS data used here were produced by NSF/NOAO.
来源： N.A. Sharp/KPNO/NOIRLab/NSO/NSF/AURA
来源链接

词汇表: 天体物理学 , 可见光谱 , 光谱线 , 吸收线

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

文件 ( 图像 3.09 MB)

Teacher Training Program 2023 poster

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为 OAE 制作

图注： The poster for the 2023 Teacher Training Program
来源： IAU OAE

文件 ( 图像 8.04 MB)