保护地球，探索宇宙，发现文明
2021年12月31日 JWST on the Road to L2 Image Credit & Copyright: Malcolm Park (North York Astronomical Association) Explanation: This timelapse gif tracks the James Webb Space Telescope as it streaks across the stars of Orion on its journey to a destination beyond the Moon. Recorded on December 28, 12 consecutive exposures each 10 minutes long were aligned ...
In 2021, Hurricane Ida left over 1 million people without power, tornadoes tore across the American Midwest, volcanoes forced people to evacuate their homes, wildfires covered the American West and unusual flooding wreaked havoc on Central Europe. 2021年，飓风艾达导致100多万人断电，龙卷风席卷美国中西部，火山爆发迫使人们撤离家园，野火覆盖美国西部，罕见的洪水对中欧造成严重破坏。 Some characteristics of natural hazards, s...
This composite image made from seven frames shows the International Space Station, with a crew of seven onboard, in silhouette as it transits the Sun at roughly five miles per second, Friday, June 25, 2021, from near Nellysford, Va. Onboard are Expedition 65 NASA astronauts Megan McArthur, Mark Vande Hei, Shane Kimbrough, ESA (European Space Agency) astronau...
2021年12月30日 The Further Tail of Comet Leonard Image Credit & Copyright: Daniele Gasparri Explanation: Comet Leonard, brightest comet of 2021, is at the lower left of these two panels captured on December 29 in dark Atacama desert skies. Heading for its perihelion on January 3 Comet Leonard’s visible tail has grown. Stacked exposures with a wide an...
2021年12月29日 Giant Storms and High Clouds on Jupiter Image Credit: NASA/JPL-Caltech/SwRI/MSSS; Processing & License: Kevin M. Gill Explanation: What and where are these large ovals? They are rotating storm clouds on Jupiter imaged last month by NASA’s Juno spacecraft. In general, higher clouds are lighter in color, and the lightest clouds visible a...
2021年12月28日 Sun Halo over Sweden Video Credit & Copyright: Håkan Hammar (Vemdalen Ski Resort, SkiStar) Explanation: What’s happened to the Sun? Sometimes it looks like the Sun is being viewed through a giant lens. In the featured video, however, there are actually millions of tiny lenses: ice crystals. Water may freeze in the atmosphere into small...
2021年12月27日 Comet Leonard behind JWST Launch Plume Image Credit & Copyright: Matipon Tangmatitham (NARIT) Explanation: Which one of these two streaks is a comet? Although they both have comet-like features, the lower streak is the only real comet. This lower streak shows the coma and tail of Comet Leonard, a city-sized block of rocky ice that is passing...
2021年12月26日 James Webb Space Telescope over Earth Image Credit: Arianespace, ESA, NASA, CSA, CNES Explanation: There’s a big new telescope in space. This one, the James Webb Space Telescope (JWST), not only has a mirror over five times larger than Hubble’s in area, but can see better in infrared light. The featured picture shows JWST high above t...
编者按：此版本于12月25日更新，以反映天文台在大约870英里(1400公里)处的数据。 NASA的詹姆斯·韦伯太空望远镜于美国东部时间周六早上7点20分由阿丽亚娜5号火箭从位于南美洲法属圭亚那的欧洲太空港发射升空。 与ESA（欧洲航天局）和加拿大航天局共同努力，韦伯天文台是NASA的革命性旗舰任务，旨在寻找早期宇宙中第一个星系的光，探索我们自己的太阳系，以及围绕其他恒星（称为系外行星）运行的行星。 NASA的詹姆斯·韦伯太空望远镜于美国东部时间12月25日上午7点20分，在位于南美洲东北海岸的法属圭亚那的欧洲太空港，用阿丽亚娜5号火箭发射升空。韦伯是欧洲航天局和加拿大航天局的合作伙伴，将探索宇宙历史的每一个阶段——从我们的太阳系内部到宇宙早期最遥远的可观测星系。 影像来源：NASA/Bill Ingalls ...
2021年12月25日 The Tail of a Christmas Comet Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) and Lukas Demetz Explanation: The tail of a comet streams across this three degree wide telescopic field of view captured under dark Namibian skies on December 21. In outburst only a few days ago and just reaching naked eye visibility Comet Leonard ...