【环球时报报道 记者 刘扬】据多家美国媒体日前报道，美国国家航空航天局（NASA）发布消息称，已在火星轨道上运行超过10年的"火星大气与挥发物 演化任务"（MAVEN）探测器突然与地面站"失联"。NASA的相关团队正在对失联情况进行调查。被称为美国火星探测任务中"最年轻轨道探测器"的 MAVEN一旦彻底失联，将会带来哪些损失？又将会对NASA的火星探测任务产生哪些连锁反应？ 根据NASA发布的消息，MAVEN于12月6日与地球地面站失去联系。此前，MAVEN的遥测数据显示，在其绕火星运行至火星背面之前，所有子系统均运 行正常。然而，当MAVEN飞出火星背后之后，NASA的深空网络未能探测到它的信号。相关团队正在调查这一异常情况并着手解决。 MAVEN探测器于2013年11月发射，并于2014年9月进入火星轨道，已经在轨工作超过10年。该任务的目标是探索火星的高层大气、电离层以及与太阳风的 相互作用，从而研究火星大气逸散到太空的过程。了解火星大气逸散有助于科学家深入了解火星大气和气候的演变史、液态水是否存在以及火星的宜居 性。此外，MAVEN探测器还是在火星表面工作的美国火星车的通信中继站。 目前NASA有3个 ...

Group 1 - The Tianwen-1 orbiter successfully observed the interstellar object Atlas (3I/ATLAS) from a distance of approximately 30 million kilometers, making it one of the closest spacecraft to observe this celestial body [1] - Atlas is the third known interstellar object to visit the solar system, traveling on a hyperbolic trajectory, and is estimated to be between 3 billion and 11 billion years old, potentially older than the solar system itself [1] - The Tianwen-1 team began preparations for the observation in early September, utilizing the orbiter's high-resolution camera and carefully designing the imaging strategy to successfully complete the observation [1] Group 2 - The documentary series "Lost Sleep," consisting of six episodes, has been broadcast on CCTV Documentary Channel, exploring the science of sleep [2] - The series features insights from over 40 experts in sleep medicine, neuroscience, psychology, and clinical medicine, presenting rigorous scientific experiments, real patient cases, and vivid imagery to reveal the mysteries of sleep [2] - Topics covered include the neural mechanisms of the brain, everyday sleep issues, the mysterious world of dreams, and the deadly risks of sleep apnea [2]

Core Viewpoint - China's Tianwen-1 orbiter successfully observed the interstellar object ATLAS, marking a significant achievement in space exploration and expanding the capabilities of the Tianwen-1 mission [1][2]. Group 1: Observation Details - The Tianwen-1 orbiter observed ATLAS from a distance of approximately 30 million kilometers, making it one of the closest observations of this interstellar body [1]. - ATLAS was discovered on July 1, 2025, by a telescope in Chile and is the third known interstellar object to visit the solar system [1]. - The object has a hyperbolic trajectory with an eccentricity of 6.23, indicating it does not follow a closed orbit around the Sun [2]. Group 2: Scientific Significance - ATLAS is estimated to be between 3 billion and 11 billion years old, potentially older than the solar system, making it a rare sample for studying the composition of exoplanets and early stellar history [2]. - The ongoing research on ATLAS aims to explore the physical properties and size of the object, which is believed to have a comet-like structure with an icy nucleus [2]. Group 3: Technical Achievements - The Tianwen-1 team began preparations for observing ATLAS in early September, overcoming challenges due to the object's small size (nucleus diameter of about 5.6 kilometers) and faint brightness [3]. - The high-resolution camera on the Tianwen-1 orbiter was utilized to capture images of ATLAS, achieving a significant technical milestone by observing a target that is 10,000 to 100,000 times dimmer than Mars [4]. - The successful observation of ATLAS serves as a technical trial for future asteroid exploration missions, particularly for Tianwen-2 [4].

Core Insights - The Tianwen-1 orbiter successfully observed the interstellar object Atlas (3I/ATLAS), marking the first time a Chinese spacecraft has observed such a celestial body [2][5] - Atlas was discovered on July 1, 2025, by a survey telescope in Chile and is the third known interstellar object to visit the solar system, potentially older than the solar system itself [2] - The observation was conducted from approximately 30 million kilometers away, making Tianwen-1 one of the closest spacecraft to the target [2] Group 1 - The successful observation of Atlas represents an important expansion task for Tianwen-1, serving as a technical trial for asteroid exploration in the upcoming Tianwen-2 mission [5] - The Tianwen-1 team began preparations for the Atlas observation in early September, facing challenges due to the object's distance, high speed (approximately 58 km/s), and small size (nucleus diameter of about 5.6 km) [5] - The brightness of Atlas was significantly dimmer than Mars, making it 10,000 to 100,000 times darker than the Martian surface, which posed high demands on the orbiter's attitude control and imaging strategy [5] Group 2 - The optical payload on Tianwen-1 was originally designed for capturing bright Martian surfaces, marking the first attempt to photograph such a distant and faint target [5] - The Tianwen-1 team conducted extensive simulations and feasibility assessments to adapt the high-resolution camera for this unique observation task [5] - Since entering Martian orbit in February 2021, Tianwen-1 has been operating stably for 4 years and 8 months [5]

Core Viewpoint - The Tianwen-1 orbiter successfully observed the interstellar object ATLAS using a high-resolution camera, marking a significant achievement in space exploration [1] Group 1: Observation Details - The Tianwen-1 orbiter was approximately 30 million kilometers away from ATLAS during the observation, making it one of the closest spacecraft to observe this celestial body [1] - The high-resolution camera captured images showing distinct cometary features of ATLAS, including its nucleus and surrounding coma, with a diameter of several thousand kilometers [1] - Researchers created an animation of ATLAS's trajectory using a series of images taken over 30 seconds, enhancing the understanding of the object's movement [1] Group 2: Mission Status - The Tianwen-1 probe entered Mars orbit in February 2021 and has been operating stably for over four years, indicating good operational status [1]

Core Viewpoint - The Tianwen-1 spacecraft successfully observed the interstellar object ATLAS, revealing its comet-like features, marking a significant achievement in China's space exploration efforts [1][3]. Group 1: Observation Details - The Tianwen-1 orbiter utilized a high-resolution camera to observe ATLAS from approximately 30 million kilometers away, making it one of the closest probes to this celestial body [2][3]. - ATLAS, discovered on July 1, 2025, by a telescope in Chile, is the third known interstellar object to visit the solar system, with an estimated age between 3 billion and 11 billion years [3][5]. Group 2: Findings from the Observation - The images captured during the observation clearly show the comet-like characteristics of ATLAS, including a nucleus and surrounding coma, with a diameter of several thousand kilometers [5][8]. - The research team created an animation of ATLAS's trajectory using a series of images taken over 30 seconds, indicating ongoing in-depth studies of the object [5]. Group 3: Preparation and Challenges - The Tianwen-1 spacecraft, operational since February 2021, underwent extensive preparations for the ATLAS observation starting in early September [6]. - The observation posed significant challenges due to the object's distance, rapid movement, and small size, requiring precise control of the spacecraft's orientation and imaging strategy [6][8]. Group 4: Technological Significance - This observation represents a critical expansion of Tianwen-1's mission capabilities, as the optical equipment was originally designed for bright Martian surfaces, marking the first attempt to capture images of such a distant and faint target [8]. - The successful observation of ATLAS serves as a technical trial for future asteroid exploration missions with Tianwen-2, contributing valuable experience to the program [8].

Core Viewpoint - The successful observation of the interstellar object Atlas by the Tianwen-1 orbiter marks a significant achievement in China's space exploration efforts, showcasing advanced capabilities in observing faint celestial bodies and contributing to future asteroid exploration missions [2][3]. Group 1: Observation Details - The Tianwen-1 orbiter successfully observed the interstellar object Atlas from a distance of approximately 30 million kilometers, making it one of the closest spacecraft to observe this celestial body [2]. - Atlas, discovered on July 1, 2025, is the third known interstellar object to visit the solar system and is believed to be between 3 billion and 11 billion years old, potentially older than the solar system itself [2]. - The high-resolution camera on Tianwen-1 captured images showing distinct comet-like features of Atlas, with a nucleus diameter of several kilometers [2]. Group 2: Technical Challenges and Solutions - The observation posed significant challenges due to the object's great distance, high relative speed (approximately 58 km/s), and small size (nucleus diameter of about 5.6 km), making it much dimmer than the Martian surface [3]. - The Tianwen-1 team began preparations for the observation in early September, employing advanced simulation and modeling techniques to assess the feasibility of the mission [3]. - The high-resolution camera, originally designed for bright Martian surface imaging, was adapted to capture this faint target, which is 10,000 to 100,000 times dimmer than the Martian surface [3]. Group 3: Mission Status - The Tianwen-1 probe has been operational since February 2021, successfully maintaining a stable status for 4 years and 8 months [4].

Core Insights - China's Tianwen-1 successfully observed the interstellar object Atlas, showcasing its comet-like features, marking a significant achievement in space exploration [1][3]. Group 1: Observation Details - The Tianwen-1 orbiter utilized a high-resolution camera to capture images of Atlas from approximately 30 million kilometers away, making it one of the closest observations of the object to date [1][3]. - The images revealed distinct comet characteristics, including a nucleus and surrounding coma, with a diameter of several thousand kilometers [3]. Group 2: Background on Atlas - Atlas is the third known interstellar object to visit the solar system, discovered on July 1, 2025, by a telescope in Chile, and is believed to be between 3 billion and 11 billion years old [2]. - The object is considered a rare sample for studying the composition and evolution of exoplanets and early stellar history [2]. Group 3: Preparation and Challenges - The Tianwen-1 mission has been operational since February 2021 and has been preparing for the Atlas observation since early September [4]. - The observation posed significant challenges due to the object's distance, high relative speed, and low brightness, requiring advanced imaging strategies and precise control of the orbiter's orientation [4]. Group 4: Technological Significance - The high-resolution camera on Tianwen-1 was originally designed for capturing bright Martian surfaces, making this observation of a distant and dim target a pioneering effort [7]. - The successful observation of Atlas serves as a crucial test for future asteroid exploration missions, particularly for the upcoming Tianwen-2 mission [7].

Core Insights - The Tianwen-1 orbiter successfully observed the interstellar object Atlas (3I/ATLAS), marking the first time a Chinese spacecraft has observed an interstellar body [1] - Atlas was discovered on July 1, 2025, by a survey telescope in Chile and is the third known interstellar object to visit the solar system, potentially older than the solar system itself [1] - The observation was conducted from approximately 30 million kilometers away, making Tianwen-1 one of the closest detectors to the object [1] Group 1 - The observation of Atlas is a significant extension of the Tianwen-1 mission, providing technical trials for future asteroid exploration with Tianwen-2 [5] - The Tianwen-1 team began preparations for the observation in early September, facing challenges due to the object's distance, speed, and small size [5][6] - The high-resolution camera on Tianwen-1 was originally designed for capturing bright Martian surfaces, making this the first attempt to photograph such a distant and faint target [5][6] Group 2 - The observation required extensive simulations and calculations to assess feasibility, leading to the successful design of a key imaging strategy [6] - Tianwen-1 has been operational since February 2021, maintaining a stable status for 4 years and 8 months [6]

Core Points - The Tianwen-1 orbiter successfully observed the interstellar object ATLAS using a high-resolution camera, marking one of the closest observations of the object at approximately 30 million kilometers away [1] - The high-resolution camera captured images showing distinct cometary features of ATLAS, including its nucleus and surrounding coma, with a diameter of several thousand kilometers [1] - Researchers are utilizing a series of images taken over 30 seconds to create an animation that illustrates the motion trajectory of ATLAS, facilitating further in-depth studies of the object [1] Group 1 - The Tianwen-1 probe has been in stable operation for over four years since entering Mars orbit in February 2021, indicating its good operational status [2]