搜索结果: 61-75 共查到“国际动态 天文学”相关记录3291条 . 查询时间(0.707 秒)
Astrophysicists have performed a powerful new analysis that places the most precise limits yet on the composition and evolution of the universe. With this analysis, dubbed Pantheon+, cosmologists find...
Black hole burps up shredded star（图）
黑洞 恒星残骸 天文学
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2023/6/25
In October 2018, a small star was ripped to shreds when it wandered too close to a black hole in a galaxy located 665 million light years away from Earth. Though it may sound thrilling, the event did ...
Astronomers find a “cataclysmic” pair of stars with the shortest orbit yet（图）
“灾难性”恒星 恒星 双星系统
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2023/6/9
Nearly half the stars in our galaxy are solitary like the sun. The other half comprises stars that circle other stars, in pairs and multiples, with orbits so tight that some stellar systems could fit ...
When NASA’s 990-pound Dragonfly rotorcraft reaches the Selk crater region – the mission’s target touchdown spot – on Saturn’s moon Titan in 2034, Cornell’s Léa Bonnefoy '15 will have helped to make it...
The exploration era for the new James Webb Space Telescope (JWST) is getting hot – volcanically hot.
北京大学地球与空间科学学院田晖课题组与合作者实现我国首次太阳过渡区探测（图）
田晖 太阳过渡区 卫星搭载
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2023/6/21
2022年7月27日，中科院空间新技术试验卫星系列首发星（SATech-01）通过“力箭一号”运载火箭成功发射到约500公里高度的太阳同步轨道上。
北京大学宗秋刚教授团队发现太空跨尺度能量传输新机制（图）
宗秋刚 太空尺度 能量传输
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2023/6/21
宇宙空间存在着多种不同尺度的物理行为，从由电子回旋运动（千米）和离子回旋运动（千米）表征的微观尺度，一直延伸到与行星大小相当的宏观尺度（千米），跨越超过8个数量级。这些不同尺度的物理过程如何耦合？能量如何在它们之间输运？
Swirling around the planet’s equator, the rings of Saturn are a dead giveaway that the planet is spinning at a tilt. The belted giant rotates at a 26.7-degree angle relative to the plane in which it o...
2020年12月，我国“嫦娥”五号成功从月球采集1.731 kg月壤样品，并顺利返回地球。这是我国首次地外天体采样返回任务，也是继1976年前苏联Luna 24任务后，时隔44年人类再次成功从月球采集并返回样品。
For the first time, astronomers have used NASA’s James Webb Space Telescope (JWST) to take a direct image of a planet outside our solar system. The exoplanet is a gas giant, meaning it has no rocky su...
Astronomers see carbon dioxide on planet outside solar system for first time（图）
詹姆斯韦伯 太空望远镜 系外行星 大气
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2023/6/25
Scientists using NASA’s James Webb Space Telescope have captured definitive evidence of carbon dioxide in the atmosphere of a planet beyond our solar system.
As praise pours in for the images released July 12 from NASA’s new James Webb Space Telescope (JWST) – the next-generation telescope able to peer deeper into the cosmos – Cornell astronomy faculty who...
陨石和地外样品是目前能获取到的来自其他天体的最直接地质证据。研究陨石和地外样品的目的在于揭示太阳系及其所含天体的宏观与微观演化过程，并为行星与星际环境和星际移民与外星生命的可能性提供新的见解。
北京大学的行星科学研究系列报道（4）：行星际空间中的“风、尘、冰、石”的奇缘（图）
星际空间 太阳系 彗星 小天体
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2023/6/21
所谓行星际空间是人类太空探测飞出地球空间进入的下一层空间，也是太阳系深空探测以及进入系外星际空间探测的必经之路。
A rare and persistent rapid-fire fast radio burst source – sending out an occasional and informative cosmic ping from more than 3.5 billion light years away – now helps to reveal the secrets of the br...