保护地球，探索宇宙，发现文明
In this image from August 2021, NASA astronaut Mark Vande Hei sits and reads while aboard the International Space Station. Vande Hei made it into record books on Tuesday, March 15, 2022: He broke the record for the most consecutive days in space by an American explorer. Vande Hei arrived at the space station on April 9, 2021, and is expected to return home M...
2022年3月16日 The Observable Universe Illustration Credit & Licence: Wikipedia, Pablo Carlos Budassi Explanation: How far can you see? Everything you can see, and everything you could possibly see, right now, assuming your eyes could detect all types of radiations around you — is the observable universe. In light, the farthest we can see comes from t...
在2021年4月8日，即任务的第四十八个火星日，NASA的毅力号火星车上的Mastcam-Z仪器拍摄的这段视频中可以看到机智号火星直升机的碳纤维叶片。在实际启动之前，他们正在进行一个摆动测试，以确保它们正常工作。 影像来源：NASA/JPL-Caltech/ASU 随着最近第21次飞行的完成，这架红色星球旋翼飞行器将在第二年的运行中创造更多记录。 NASA已将机智号火星直升机的飞行操作延长至 9 月。在接下来的几个月里，历史上第一架从另一个世界表面运行的飞机将支持毅力号火星车即将进行的探索杰泽罗火山口古老河流三角洲的科学活动。在此过程中，它将继续测试自己的能力，以支持未来火星飞行器的设计。 这一消息是在旋翼机第21次成功飞行之后宣布的，这是直升机穿越Séítah西北部地区并到达下一个停靠区所需的至少三次飞行中的...
2022年3月15日 A Road to the Stars Image Credit: ESO, Petr Horálek (ESO Photo Ambassador, Inst. of Physics in Opava) Explanation: Pictured — a very scenic road to the stars. The road approaches La Silla Observatory in Chile, with the ESO’s 3.6-meter telescope just up ahead. To the left are some futuristic-looking support structures for the planned Bl...
Today is Pi Day, March 14, 2022! Each year NASA celebrates pi with a host of educational activities that focus on its importance to our missions. This “Pi in the Sky” math challenge gives students a chance to take part in recent discoveries and upcoming celestial events, all while using math and pi just like NASA scientists and engineers. In this...
2022年3月14日 Star Formation in the Eagle Nebula Image Credit: NASA, ESA, Hubble; Processing & Copyright: Ignacio Diaz Bobillo & Diego Gravinese Explanation: Where do stars form? One place, star forming regions known as “EGGs”, are being uncovered at the end of this giant pillar of gas and dust in the Eagle Nebula (M16). Short for evaporat...
永久冻土的融化会导致土地消失，如图所示，阿拉斯加德鲁角沿岸的部分海岸断崖已塌陷入海。 影像来源：本杰明·琼斯，美国地质勘探局 为了更全面地了解气候变化是如何影响地球上的冰冻地区，科学家们正在结合从空气、陆地和太空收集的数据。 被困在地球永久冻土层（至少会冻结两年的土地）中的是无数的温室气体、微生物和化学物质，包括现在被禁止的杀虫剂DDT。随着地球变暖，永久冻土正在以越来越快的速度融化，科学家们在试图确定永久冻土融化的潜在影响时面临着许多不确定性。 今年早些时候发表在《自然评论地球与环境》杂志上的一篇论文着眼于永久冻土研究的现状。除了强调关于永久冻土融化的结论外，这篇论文还关注了研究人员正在寻求如何解决围绕它的问题。 基础设施已经受到影响：永久冻土融化导致巨大的天坑、电线杆坍塌、道路和跑道受损以及树木倒塌。很难看...
2022年3月13日 Colorful Airglow Bands Surround Milky Way Image Credit & Copyright: Xiaohan Wang Explanation: Why would the sky glow like a giant repeating rainbow? Airglow. Now air glows all of the time, but it is usually hard to see. A disturbance however — like an approaching storm — may cause noticeable rippling in the Earth’s atmospher...
2022年3月12日 Point Reyes Milky Way Image Credit & Copyright: Dan Zafra Explanation: Northern winter constellations and a long arc of the Milky Way are setting in this night skyscape looking toward the Pacific Ocean from Point Reyes on planet Earth’s California coast. Sirius, alpha star of Canis Major, is prominent below the starry arc toward the lef...
An energetic outburst from an infant star streaks across this image from the NASA/ESA Hubble Space Telescope. This stellar tantrum – produced by an extremely young star in the earliest phase of formation – consists of an incandescent jet of gas travelling at supersonic speeds. As the jet collides with material surrounding the still-forming star, the shock he...