保护地球，探索宇宙，发现文明
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 quit...
2022年5月7日 Firefall by Moonlight Image Credit & Copyright: Tara Mostofi Explanation: On certain dates in February, an elusive firefall can be spotted at sunset in Yosemite National Park, when water flows, the weather cooperates and the direction to the setting Sun is just right. Often photographed from vantage points below, at the right moment the park&#...
5月份的天空会发生什么？昏星和晨星，月食和后发星系团。
4月份的天空会发生什么？行星近合和北斗七星中隐藏的惊喜。
3月份的天空会发生什么？认识早晨的行星、最近的星团，还有自己动手寻找系外行星。
2022年2月28日 Direct Projection: The Moon in My Hands Image Credit & Copyright: Jeff Graphy Explanation: You don’t have to look through a telescope to know where it’s pointing. Allowing the telescope to project its image onto a large surface can be useful because it dilutes the intense brightness of very bright sources. Such dilution is useful ...
2022年2月15日 Terminator Moon Image Credit: NASA, Lunar Reconnaissance Orbiter, SVS; Processing & Copyright: Jai & Neil Shet Explanation: What’s different about this Moon? It’s the terminators. In the featured image, you can’t directly see any terminator — the line that divides the light of day from the dark of night. That̵...
2022年2月4日 Moons at Twilight Image Credit & Copyright: Robert Fedez Explanation: Even though Jupiter was the only planet visible in the evening sky on February 2, it shared the twilight above the western horizon with the Solar System’s brightest moons. In a single exposure made just after sunset, the Solar System’s ruling gas giant is at the ...
2022年2月3日 Embraced by Sunlight Image Credit & Copyright: Juan Luis Cánovas Pérez Explanation: Even though Venus (left) was the brightest planet in the sky it was less than 1/30th the apparent size of the Moon on January 29. But as both rose before the Sun they shared a crescent phase. For a moment their visible disks were each about 12 percent illuminat...
二月份的天空会发生什么？ 木星退场，金星亮度达到峰值，以及隔壁的恒星形成云。 影像来源：NASA/JPL-Caltech 翻译：灼眼的粉丝 在过去的两个月里，随着土星和金星的离开，木星是二月份在我们暮色天空中剩下的唯一一颗明亮的行星，而它即将消失。这颗巨大的行星孤零零地矗立在2月日落后的西方天空中。到本月中旬，它仅比太阳晚一小时落下。一旦木星在2月底离开，在8月之前日落后的天空将基本上没有肉眼可见的行星，直到土星将在日落时分开始在东方升起。（不过，在4月和5月的一小段时间里，你可能会看到水星短暂地出现在地平线上。） 木星是二月日落后唯一肉眼可见的行星。 图片来源：NASA/JPL-Caltech 你必须回到4年前，也就是2018年3月，才能找到没有明亮行星的黄昏天空。所以在木星消失之前抓住它，并期待它在四月成为...