NASA·每日一图

This artist’s concept depicts a smaller white dwarf star pulling material from a larger star, right, into an accretion disk.
这幅艺术构想描绘了一颗较小的白矮星从右侧一颗更大的恒星中吸积物质，并形成旋转的吸积盘。

Images depicting NASA’s Space Launch System (SLS) rocket are projected onto the Washington Monument as part of an event to kick off the nation’s 250th birthday year, Wednesday, Dec. 31, 2025, in Washington.
为庆祝美国建国250周年，NASA的太空发射系统火箭的影像将于2025年12月31日（星期三）在华盛顿投影到华盛顿纪念碑上。

Artemis II crewmembers (left to right) NASA astronauts Christina Koch, mission specialist; and Victor Glover, pilot; CSA (Canadian Space Agency) astronaut Jeremy Hansen, mission specialist; and NASA astronaut Reid Wiseman, commander are led by Bill Owens of the Closeout Crew from the elevator at the 275-foot level of the mobile launcher to the crew access arm as they prepare to board their Orion spacecraft atop NASA’s Space Launch System rocket during the Artemis II countdown demonstration test, Saturday, Dec. 20, 2025, inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida.
在2025年12月20日星期六，于佛罗里达州NASA肯尼迪航天中心的车辆组装大楼内，阿尔忒弥斯2号任务机组成员从左至右依次为NASA宇航员克里斯蒂娜·科赫（任务专家）、维克托·格洛弗（飞行员）、加拿大航天局宇航员杰里米·汉森（任务专家）以及NASA宇航员里德·怀斯曼（指令长）。

NASA astronaut Nichole Ayers captured this image of lightning while orbiting aboard the International Space Station more than 250 miles above Milan, Italy on July 1, 2025.
2025年7月1日，NASA宇航员妮科尔·艾尔斯在距地面250多英里的轨道上，搭乘国际空间站飞越意大利米兰上空时，拍摄到了这张闪电图像。

NASA’s SPHEREx Observatory has mapped the entire sky in 102 infrared colors, as seen here in this image released on Dec. 18, 2025.
NASA的SPHEREx天文台在2025年12月18日发布的这张图像中，以102种红外颜色绘制了整个天空。

A scientific balloon starts its ascent into the air as it prepares to launch carrying NASA’s Payload for Ultrahigh Energy Observations (PUEO) mission.
一只科学气球开始升空，准备搭载NASA的超高能观测有效载荷任务PUEO进入空中。

This NASA/ESA Hubble Space Telescope image features the galaxy NGC 4388, a member of the Virgo galaxy cluster.
这张NASA/ESA哈勃太空望远镜图像展示了星系NGC4388，它是室女座星系团的成员之一。

Team members working with NASA’s Curiosity Mars rover created this “postcard” by commanding the rover to take images at two times of day on Nov. 18, 2025, spanning periods that occurred on both the 4,722nd and 4,723rd Martian days, or sols, of the mission.
NASA好奇号火星车团队通过指令火星车在2025年11月18日的两个不同时段拍摄图像，制作了这张“明信片”。拍摄时间横跨任务的第4722个和第4723个火星日。

Mid-infrared data from NASA’s James Webb Space Telescope (in white, gray, and red) and X-ray data from NASA’s Chandra X-ray Observatory (in blue) come together in this photo of colliding spiral galaxies released on Dec. 1, 2025.
这张于2025年12月1日发布的图像将来自詹姆斯·韦伯太空望远镜的中红外数据（以白色、灰色和红色呈现）与来自钱德拉X射线天文台的X射线数据（以蓝色呈现）融合在一起，展示了一对正在相互碰撞的旋涡星系。

In this Oct. 20, 2025, photo, tiny ball bearings surround a larger central bearing during the Fluid Particles experiment, conducted inside the Microgravity Science Glovebox (MSG) aboard the International Space Station’s Destiny laboratory module.
在2025年10月20日拍摄的这张照片中，在国际空间站命运号实验舱内的微重力科学手套箱中开展的流体颗粒实验里，微小的钢珠围绕着一个更大的中心轴承分布。