智利山丘上空西落的阿特拉斯彗星
See Explanation. Clicking on the video will download the highest resolution version available.
请参阅说明。单击视频将下载可用的最高分辨率版本。
巴塔哥尼亚上空的日环食
A person stands looking over a lake. High in a partly cloudy sky is the Sun. A close look at the Sun will show that there is a dark spot in the center — the Moon during an annular eclipse. Please see the explanation for more detailed information.
一个人站在湖边眺望。在多云的天空中，太阳高高挂起。仔细观察太阳，会发现中央有一个黑点，这就是日环食时的月球。有关更多详细信息，请参阅说明。
落日的多重绿闪
2023年3月28日 A Multiple Green Flash Sunset Image Credit & Copyright: T. Slovinský & P. Horálek (IoP Opava); CTIO, NOIRLab, NSF, AURA Explanation: Yes, but can your green flash do this? A green flash at sunset is a rare event that many Sun watchers pride themselves on having seen. Once thought to be a myth, a green flash is now understood to occur when the Earth’s atmosphere acts like both a prism and a lens. Different atmospheric layers create altitude-variable refraction that takes light from the top of the Sun and disperses its colors, creates two images, and magnifies it in just the right way to make a thin sliver appear green just before it disappears. Pictured, though, is an even more unusual sunset. From the…
智利火山上空的南十字
2021年01月25日 Southern Cross over Chilean Volcano Image Credit & Copyright: Tomáš Slovinský Explanation: Have you ever seen the Southern Cross? This famous four-star icon is best seen from Earth’s Southern Hemisphere. The featured image was taken last month in Chile and captures the Southern Cross just to the left of erupting Villarrica, one of the most active volcanos in our Solar System. Connecting the reddest Southern Cross star Gacrux through the brightest star Acrux points near the most southern location in the sky: the South Celestial Pole (SCP), around which all southern stars appear to spin as the Earth turns. In modern times, no bright star resides near the SCP, unlike in the north where bright Polaris now appears near the NCP. Extending the Gacrux…