搜索结果: 46-60 共查到“国际动态 天文学”相关记录239条 . 查询时间(2.037 秒)
Mysteriously bright flash is a black hole jet pointing straight toward Earth, astronomers say（图）
黑洞生长 超大质量黑洞 兹威基瞬态设施 天文观测
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2023/6/9
Earlier this year, astronomers were keeping tabs on data from the Zwicky Transient Facility, an all-sky survey based at the Palomar Observatory in California, when they detected an extraordinary flash...
中国物理学会揭示古老恒星钙丰度之谜（图）
古老恒星 钙丰度 中国物理学会
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2023/2/23
近日，南方科技大学物理系讲席教授、中国原子能科学研究院研究员柳卫平带领的基金委重大项目JUNA合作组，依托中国锦屏深地核天体物理实验装置（JUNA），对关键核天体反应19F(p,g)20Ne进行了反应截面的直接测量，将测量范围推进到世界最低能区，并发现了一个新的共振，解释了宇宙中已知最古老恒星（SMSS0313-6708）的钙丰度起源问题。相关成果发表于国际顶级期刊《自然》（Nature）上并被选...
Mystery of dark matter — and search for WIMP（图）
暗物质 WIMP 粒子物理学
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2023/6/21
Scientists know that dark matter exists because although we can’t see it, we can see the effects of what it does in the world, sort of like a ghost bumping around a haunted house. And we’re not sure w...
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...
Method for decoding asteroid interiors could help aim asteroid-deflecting missions（图）
小行星内部 小行星偏转 自旋变化
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2023/6/9
NASA hit a bullseye in late September with DART, the Double Asteroid Redirection Test, which flew a spacecraft straight at the heart of a nearby asteroid. The one-way kamikaze mission smashed into the...
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.
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...
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...
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...
How the universe got its magnetic field（图）
宇宙 磁场 等离子体湍流
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2023/6/9
When we look out into space, all of the astrophysical objects that we see are embedded in magnetic fields. This is true not only in the neighborhood of stars and planets, but also in the deep space be...