保护地球，探索宇宙，发现文明
Nestled among the vast clouds of star-forming regions like this one lie potential clues about the formation of our own solar system. This image from the NASA/ESA Hubble Space Telescope features AFGL 5180, a beautiful stellar nursery located in the constellation of Gemini (the Twins). At the center of the image, a massive star is forming and blasting cavities...
2021年8月18日 Rings Around the Ring Nebula Image Credit: Hubble, Large Binocular Telescope, Subaru Telescope; Composition & Copyright: Robert Gendler Explanation: The Ring Nebula (M57), is more complicated than it appears through a small telescope. The easily visible central ring is about one light-year across, but this remarkably deep exposure – a c...
2021年8月17日 M57: The Ring Nebula from Hubble Image Credit: NASA, ESA, Hubble Legacy Archive; Processing: Judy Schmidt Explanation: Except for the rings of Saturn, the Ring Nebula (M57) is probably the most famous celestial circle. Its classic appearance is understood to be due to our own perspective, though. The recent mapping of the expanding nebula’s ...
2021年8月16日 Perseid Meteor, Red Sprites, and Nova RS Ophiuchus Image Credit & Copyright: Daniel Korona Explanation: This was an unusual sky. It wasn’t unusual because of the central band the Milky Way Galaxy, visible along the image left. Most dark skies show part of the Milky Way. It wasn’t unusual because of the bright meteor visible on the...
2021年8月15日 Perseid Rain Image Credit & Copyright: Luo Hongyang Explanation: Comet dust rained down on planet Earth last week, streaking through dark skies in the annual Perseid meteor shower. The featured picture is a composite of many images taken from the same location over the peak night of the Perseids. The umbrella was not needed as a shield from m...
This image, taken from aboard the International Space Station, shows the aurora australis as it streams across the Earth’s atmosphere as the station orbited 271 miles above the southern Indian Ocean in between Asia and Antarctica. Named for the Roman goddess of dawn, the aurora is a captivating display of light in the night sky. The aurora borealis and...
2021年8月14日 Island Universe, Cosmic Sand Image Credit & Copyright: Marzena Rogozinska Explanation: Stars in our own Milky Way Galaxy are scattered through this eye-catching field of view. From the early hours after midnight on August 13, the 30 second exposure of the night sky over Busko-Zdroj, Poland records the colorful and bright trail of a Perseid me...
2021年8月13日 A Perfect Spiral Image Credit: NASA, ESA, Hubble, HLA; Processing: Mehmet Hakan Ozsarac Explanation: If not perfect then this spiral galaxy is at least one of the most photogenic. An island universe of about 100 billion stars, 32 million light-years away toward the constellation Pisces, M74 presents a gorgeous face-on view. Classified as an Sc gal...
DART坐落在一个高高的无尘室中间的支架上，开始看起来像一个无畏的航天器，它将在明年秋天直接前往一颗小行星。随着其紧凑的推出式太阳能阵列（ROSA）盘绕在航天器两侧的两个金色圆柱体中，以及其不太显眼但仍然完整的成像器——用于光学导航的Didymos侦察和小行星相机（DRACO）安全地藏在其面板下，该航天器已接近完全组装完成。 这种现有技术和新技术的混合，其中一些技术将首次展示，将见证DART完成其10个月的小行星目标之旅。 最近安装的推出式太阳能阵列（ROSA）和用于光学导航的Didymos侦察和小行星相机（DRACO）是两项关键技术，它们将使DART航天器能够在太空中导航并有效到达Didymos小行星系统。 影像来源：NASA/Johns Hopkins APL/Ed Whitman 美国宇航局的DART，即...
Known as NGC 6523 or the Lagoon Nebula, Messier 8 is a giant cloud of gas and dust where stars are born. At about 4,000 light years from Earth, Messier 8 provides astronomers an excellent opportunity to study the properties of very young stars. Many infant stars give off copious amounts of high-energy light including X-rays, which are seen in the Chandra dat...