数码时代的月食

数码时代的月食

ByNASA中文

2022年5月19日 A Digital Lunar Eclipse Image Credit & Copyright: Michael Cain Explanation: Recorded on May 15/16 this sequence of exposures follows the Full Moon during a total lunar eclipse as it arcs above treetops in the clearing skies of central Florida. A frame taken every 5 minutes by a digital camera shows the progression of the eclipse over three hours. The bright lunar disk grows dark and red as it glides through planet Earth’s shadow. In fact, counting the central frames in the sequence measures the roughly 90 minute duration of the total phase of this eclipse. Around 270 BC, the Greek astronomer Aristarchus also measured the duration of total lunar eclipses, but probably without the benefit of digital watches and cameras. Still, using geometry…

镶钻的花月

镶钻的花月

ByNASA中文

2022年5月18日 A Jewel on the Flower Moon Image Credit & Copyright: Tomas Slovinsky Explanation: Cloudy skies plagued some sky watchers on Sunday as May’s Full Flower Moon slipped through Earth’s shadow in a total lunar eclipse. In skies above Chile’s Atacama desert this telephoto snapshot still captured an awesome spectacle though. Seen through thin high cirrus clouds just before totality began, a last sliver of sunlit crescent glistens like a hazy jewel atop the mostly shadowed lunar disk. This full moon was near perigee, the closest point in its elliptical orbit. It passed near the center of Earth’s dark umbral shadow during the 90 minute long total eclipse phase. Faintly suffused with sunlight scattered by the atmosphere, the umbral shadow itself gave the eclipsed moon…

月亮的色泽

月亮的色泽

ByNASA中文

2022年5月15日 Colors of the Moon Image Credit & Copyright: Marcella Giulia Pace Explanation: What color is the Moon? It depends on the night. Outside of the Earth’s atmosphere, the dark Moon, which shines by reflected sunlight, appears a magnificently brown-tinged gray. Viewed from inside the Earth’s atmosphere, though, the moon can appear quite different. The featured image highlights a collection of apparent colors of the full moon documented by one astrophotographer over 10 years from different locations across Italy. A red or yellow colored moon usually indicates a moon seen near the horizon. There, some of the blue light has been scattered away by a long path through the Earth’s atmosphere, sometimes laden with fine dust. A blue-colored moon is more rare and can indicate…

血月

血月

ByNASA中文

2021年06月04日 Blood Monster Moon Image Credit & Copyright: Chirag Upreti Explanation: On May 26, the Full Flower Moon was caught in this single exposure as it emerged from Earth’s shadow and morning twilight began to wash over the western sky. Posing close to the horizon near the end of totality, an eclipsed lunar disk is framed against bare oak trees at Pinnacles National Park in central California. The Earth’s shadow isn’t completely dark though. Faintly suffused with sunlight scattered by the atmosphere, the inner shadow gives the totally eclipsed moon a reddened appearance and the very dramatic popular moniker of a Blood Moon. Still, the monstrous visage of a gnarled tree in silhouette made this view of a total lunar eclipse even scarier. Tomorrow’s picture:…

NASA一周新闻（2021.5.28）

NASA一周新闻（2021.5.28）

ByNASA中文

NASA预算请求的公布… 一组新的以地球为中心的任务… 一组新的以地球为中心的任务… 最近新闻速递，尽在「本周NASA」！ 来源：NASA 翻译：灼眼的粉丝 NASA概述总统2022财政年度资金请求 5月28日，NASA局长、参议员比尔·纳尔逊和其他高级官员向媒体通报了拜登·哈里斯政府对该机构2022财年的预算申请，此前白宫发布了全部预算申请。有关248亿美元预算申请的详细信息和支持信息，请访问nasa.gov/budget。 新的NASA地球系统天文台 NASA的地球系统天文台将是一组新的以地球为中心的任务，使用单独的卫星提供关键的下一代数据，以帮助减缓气候变化、保护面临自然灾害的社区并改善实时农业进程。这些卫星将相互补充，协同工作，创造一个三维的地球整体视图，以及对地球气候系统的前所未有的理解。如需更多信息，请访问：nasa.gov/earth。 木卫二上的海底火山？ 新的研究和3D计算机模型显示，在最近的过去，木星的卫星木卫二的海底可能发生过火山活动——而且可能仍然在发生。这项新工作表明木卫二内部可能有足够的热量部分融化其岩石层，这一过程可能为海底的火山提供能量。NASA即将于2024年发射的木卫二快船任务可能会为这些最新发现提供线索。 60年前，肯尼迪发表“国家迫切需要”的演讲 5月25日是约翰·F·肯尼迪总统在国会联席会议上发表“国家迫切需要”演讲的60周年纪念日。他在演讲中寻求对一项大胆努力的支持以使美国无可争议地在与苏联的太空竞赛中处于领先地位。 “我相信这个国家应该致力于在这个十年结束之前，实现人类登陆月球并安全返回地球的目标。”——肯尼迪的演讲摘录 仅仅8年多一点的时间，肯尼迪的愿景就得到了实现，美国成为第一个将人类送上月球并搭载阿波罗11号安全返回地球的国家。 三赏月全食 5月26日，地球上的一些人在天空中享受到了三重天赐。这是近两年半以来的第一次月全食。除此之外，月食导致的月球略带红色，最重要的是，这一切都发生在今年月球最接近地球的满月期间——通常被称为超级月亮。近6年来，我们从未见过月全食同时出现超级月亮的情况。 以上就是「本周 NASA」的全部内容！更多详细信息请访问nasa.gov/twan。 参考来源： https://www.nasa.gov/mediacast/this-week-nasa-may-28-2021

悉尼上空的全食月

悉尼上空的全食月

ByNASA中文

2021年05月28日 Total Lunar Eclipse from Sydney Image Credit & Copyright: Peter Ward (Barden Ridge Observatory) Explanation: The reddened shadow of planet Earth plays across the lunar disk in this telescopic image taken on May 26 near Sydney, New South Wales, Australia. On that crisp, clear autumn night a Perigee Full Moon slid through the northern edge of the shadow’s dark central umbra. Short for a lunar eclipse, its total phase lasted only about 14 minutes. The Earth’s shadow was not completely dark though. Instead it was suffused with a faint red light from all the planet’s sunsets and sunrises seen from the perspective of an eclipsed Moon, the reddened sunlight scattered by Earth’s atmosphere. The HDR composite of 6 exposures also shows the wide range…

食月与银河

食月与银河

ByNASA中文

2021年05月27日 Mid-Eclipse and Milky Way Image Credit & Copyright: John Kraus Explanation: May’s perigee Full Moon slid through Earth’s shadow yesterday entertaining night skygazers in regions around the Pacific. Seen from western North America, it sinks toward the rugged Sierra Nevada mountain range in this time-lapse series of the total lunar eclipse. Low on the western horizon the Moon was captured at mid-eclipse with two separate exposures. Combined they reveal the eclipsed Moon’s reddened color against the dark night sky and the diffuse starlight band of the Milky Way. Frames taken every five minutes from the fixed camera follow the surrounding progression of the eclipse partial phases. In the foreground a radio telescope dish at California’s Owen’s Valley Radio Observatory points skyward. Tomorrow’s picture: pixels…

月全食期间的月亮

月全食期间的月亮

ByNASA中文

2021年05月25日 The Moon During a Total Lunar Eclipse Video Credit: Wang Letian & Zhang Jiajie Explanation: How does the Moon’s appearance change during a total lunar eclipse? The featured time-lapse video was digitally processed to keep the Moon bright and centered during the 5-hour eclipse of 2018 January 31. At first the full moon is visible because only a full moon can undergo a lunar eclipse. Stars move by in the background because the Moon orbits the Earth during the eclipse. The circular shadow of the Earth is then seen moving across the Moon. The light blue hue of the shadow’s edge is related to why Earth’s sky is blue, while the deep red hue of the shadow’s center is related to why the Sun…

不同视点看月食

不同视点看月食

ByNASA中文

2020 February 5 Lunar Eclipse Perspectives Image Credit: F. Pichardo, G. Hogan, P. Horálek, F. Hemmerich, S. Schraebler, L. Hašpl, R. Eder; Processing & Copyright : Matipon Tangmatitham; Text: Matipon Tangmatitham (NARIT) Explanation: Do we all see the same Moon? Yes, but we all see it differently. One difference is the apparent location of the Moon against background stars — an effect known as parallax. We humans use the parallax between our eyes to judge depth. To see lunar parallax, though, we need eyes placed at a much greater separations — hundreds to thousands of kilometers apart. Another difference is that observers around the Earth all see a slightly different face of our spherical Moon — an effect known as libration. The featured image is…

影子里的月亮

影子里的月亮

ByNASA中文

2020 January 24 Into the Shadow Image Credit & Copyright: Laszlo Francsics Explanation: On January 21, 2019 moonwatchers on planet Earth saw a total lunar eclipse. In 35 frames this composite image follows the Moon that night as it crossed into Earth’s dark umbral shadow. Taken 3 minutes apart, they almost melt together in a continuous screen that captures the dark colors within the shadow itself and the northern curve of the shadow’s edge. Sunlight scattered by the atmosphere into the shadow causes the lunar surface to appear reddened during totality (left), but close to the umbra’s edge, the limb of the eclipsed Moon shows a remarkable blue hue. The blue eclipsed moonlight originates as rays of sunlight pass through layers high in Earth’s upper…