保护地球，探索宇宙，发现文明
2023年9月12日 Galaxy Cluster Abell 370 and Beyond Image Credit: NASA, ESA, Jennifer Lotz and the HFF Team (STScI) Explanation: Some 4 billion light-years away, massive galaxy cluster Abell 370 is captured in this sharp Hubble Space Telescope snapshot. The cluster of galaxies only appears to be dominated by two giant elliptical galaxies and infested with faint a...
在恒星背景下移动的小点是NASA的露西航天器首次看到主带小行星丁基什（Dinkish），这是该航天器将在其为期12年的发现之旅中访问的10颗小行星中的第一颗。露西于2023年9月2日和5日拍摄了这两张照片。
A snowy egret, identifiable by its slender black bill, black legs and yellow feet, marches through a pond near NASA’s Kennedy Space Center, looking for food in this image from March 29, 2007. This species inhabits salt marshes, ponds, rice field and shallow coastal bays from Maine to southern South America. They are also found in northern California, Texas, ...
2023年9月11日 Beautiful Comet Nishimura Credit & Copyright: Petr Horálek / Institute of Physics in Opava Explanation: This scene would be beautiful even without the comet. By itself, the sunrise sky is an elegant deep blue on high, with faint white stars peeking through, while near the horizon is a pleasing tan. By itself, the foreground hills of eastern S...
2023年9月10日 An Annular Solar Eclipse over New Mexico Credit & Copyright: Colleen Pinski Explanation: What is this person doing? In 2012, an annular eclipse of the Sun was visible over a narrow path that crossed the northern Pacific Ocean and several western US states. In an annular solar eclipse, the Moon is too far from the Earth to block out the entire...
2023年9月9日 Comet Nishimura Grows Credit & Copyright: Peter Kennett Explanation: Comet Nishimura is growing. More precisely, the tails C/2023 P1 (Nishimura) are growing as it nears the Sun. Discovered only last month, the comet is already near naked eye brightness as it now moves inside the Earth’s orbit. The comet will be nearest the Earth next wee...
9月24日周日清晨，OSIRIS-REx航天器的样本舱将自2016年发射以来首次与地球大气层面对面接触。航天器上估计有8.8盎司（250克）的岩石物质，这些物质是2020年从贝努表面收集，这是NASA的第一个小行星样本，也是迄今为止在太空中收集的最大的小行星样本。 当OSIRIS-REx航天器接近地球时，它不会因为样本释放而减速。相反，当它到达地球表面以上63,000英里（或102,000公里）时——大约是地球到月球距离的三分之一——地面操作人员发出的一条信息将触发太空舱的释放，太空舱将被送入下方的大气层。释放太空舱20分钟后，航天器将启动其推进器，绕过地球，转向小行星阿波菲斯，在那里它将以一个新的名字——OSIRIS-APEX （OSIRIS-Apophis Explorer），继续研究我们的太阳系。 与此同...
Support teams onboard the SpaceX recovery ship MEGAN work to open the hatch of the SpaceX Dragon Endeavour spacecraft shortly after it landed in the Atlantic Ocean on Sept. 4, 2023, with NASA astronauts Stephen Bowen and Woody Hoburg, United Arab Emirates (UAE) astronaut Sultan Alneyadi, and Roscosmos cosmonaut Andrey Fedyaev aboard. Bowen, Hoburg, Alneyadi,...
2023年9月8日 Star Factory Messier 17 Image Credit & Copyright: Kim Quick, Terry Hancock, and Tom Masterson (Grand Mesa Observatory) Explanation: Sculpted by stellar winds and radiation, the star factory known as Messier 17 lies some 5,500 light-years away in the nebula-rich constellation Sagittarius. At that distance, this 1/3 degree wide field of view spa...
This colorful image of the globular star cluster Terzan 12 is a spectacular example of how dust in space affects starlight coming from background objects. A globular star cluster is a conglomeration of stars, arranged in a spheroidal shape. Stars in globular clusters are bound together by gravity, with a higher concentration of stars towards the center. The ...