作者: NASA中文

阳光下的183天

2023年12月22日 183 Days in the Sun Image Credit & Copyright: José Zarcos Palma Explanation: A single 183 day exposure with a pinhole camera and photographic paper resulted in this long-duration solargraph. Recorded from solstice to solstice, June 21 to December 21, in 2022, it follows the Sun’s daily arcing path through planet Earth’s skies fro...

三个星系与一颗彗星

2023年12月21日 Three Galaxies and a Comet Image Credit & Copyright: Dan Bartlett Explanation: Distant galaxies abound in this one degree wide field of view toward the southern constellation Grus (The Crane). But the three spiral galaxies at the lower right are quite striking. In fact, all three galaxies are grouped about 70 million light years away and som...

研究一场有计划的火灾

Flames burn orange through green conifers and golden aspen on the slopes of Monroe Mountain in Utah’s Fishlake National Forest, sending gray and brown smoke billowing into the sky in this image from Oct. 9, 2023. This fire was intentionally set with a fire-dripping device suspended from a helicopter. The burn aimed to reintroduce fire to the Monroe Mountain ...

明亮的星星照亮了“圣诞树星团”

影像来源:X射线:NASA/CXC/SAO; 可见光:T.A. Rector (NRAO/AUI/NSF and NOIRLab/NSF/AURA) and B.A. Wolpa (NOIRLab/NSF/AURA); 红外线:NASA/NSF/IPAC/CalTech/Univ. of Massachusetts; 影像处理:NASA/CXC/SAO/L. Frattare & J.Major 这张NGC 2264的新图像,也被称为“圣诞树星团”,显示了一棵带有恒星光芒的宇宙树的形状。事实上,NGC 2264是我们银河系中的一个年轻恒星群,年龄在100万到500万年之间,距离地球约2,500光年。NGC 2264中的恒星有比太阳小的,也有比太阳大的,有的质量不到太阳的十分之一,有的质量约为太阳的七倍。...

巴伐利亚上空的冰晕

2023年12月20日 Ice Halos over Bavaria Image Credit & Copyright: Bastian Werner Explanation: What’s causing those unusual sky arcs? Ice crystals. While crossing a field of fresh snow near Füssen, Bavaria, Germany, earlier this month, the photographer noticed that he had entered an ice fog. For suspended water to freeze into an ice fog requires quite c...

NGC 1499: 加州星云

2023年12月19日 NGC 1499: The California Nebula Image Credit & Copyright: Steven Powell Explanation: Could Queen Calafia‘s mythical island exist in space? Perhaps not, but by chance the outline of this molecular space cloud echoes the outline of the state of California, USA. Our Sun has its home within the Milky Way’s Orion Arm, only about 1,000...

火星上的冰流

On Aug. 18, 2023, the Mars Reconnaissance Orbiter (MRO) captured ridged lines carved onto Mars’ landscape by the gradual movement of ice. While surface ice deposits are mostly limited to Mars’ polar caps, these patterns appear in many non-polar Martian regions. As ice flows downhill, rock and soil are plucked from the surrounding landscape and ferried along ...

同色错觉

2023年12月18日 The Same Color Illusion Image Credit: Edward H. Adelson, Wikipedia Explanation: Are squares A and B the same color? They are! To verify this, either run your cursor over the image or click here to see them connected. The featured illusion, an example of the same color illusion, illustrates that purely human perceptions in science may be ambiguous...

首次动力控制飞行120周年纪念

In this image from Dec. 17, 1903, Orville Wright makes the first powered, controlled flight on Earth as his brother Wilbur looks on. Orville Wright covered 120 feet in 12 seconds during the first flight of the day. The Wright brothers made four flights that day, each longer than the last. The aircraft, Flyer 1, was wrecked beyond repair after the fourth flig...

首席航天发射系统航空电子工程师艾丽丝-西亚·温斯利

“I was on console as a part of the primary launch team [for Artemis I]. I was the Orion system specialist for Guidance, Navigation, and Control. … In a few missions, we’re sending astronauts to the Moon again, so being a part of the very, very first mission [was memorable]. … I wasn’t here in 2017 when they first began discussions, but that within just the f...