搜索结果: 1-15 共查到“国际动态 恒星与银河系”相关记录17条 . 查询时间(1.068 秒)
巴西研究发现恒星化学成分与其行星间的相关性
巴西 恒星化学成分 行星间 相关性
2024/1/12
巴西圣保罗大学天文学、地球物理和大气科学研究所（IAG-USP）的科研人员研究了192颗与太阳相似的恒星样本，发现行星的存在与恒星中低锂含量之间存在相关性，这种相关性或有助于解释为什么太阳的锂丰度与其“双生”恒星相比异常低。这项研究使用了欧洲南方天文台（ESO）3.6米望远镜的数据，还可以通过分析恒星的化学成分来帮助识别其轨道上是否存在行星。该成果发表在天文学期刊《皇家天文学会月刊》上。
澳大利亚发现发射无线电辐射的最冷恒星
澳大利亚 无线电辐射 最冷恒星
2024/1/15
澳大利亚悉尼大学科研人员使用CSIRO ASKAP射电望远镜、澳大利亚望远镜紧凑阵列等进行观测得到的数据综合分析发现，超冷褐矮星T8 Dwarf WISE J062309.94-045624.6是有记录以来产生无线电辐射的最冷恒星。相关研究发表在《天体物理学杂志快报》上。
When a star swallows a planet, does it belch? Leave crumbs? Get bigger? No one could say for sure because no one had witnessed it — until now.
As a star runs out of fuel, it will billow out to a million times its original size, engulfing any matter — and planets — in its wake. Scientists have observed hints of stars just before, and shortly ...
When two black holes collide into each other to form a new bigger black hole, they violently roil spacetime around them, sending ripples called gravitational waves outward in all directions. Previous ...
The antimatter counterpart of a light atomic nucleus can travel a long distance in the Milky Way without being absorbed, shows the international ALICE collaboration in an article published today in Na...
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
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...
Black hole burps up shredded star（图）
黑洞 恒星残骸 天文学
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
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 ...
An international team of more than 300 scientists from 80 institutions has created the first-ever image of the supermassive black hole at the center of our Milky Way galaxy.
Even the most extreme objects in the universe – including black holes – must obey certain rules.
美科学家首次发现火星上有闪电直接证据（图）
美科学家 首次 火星 闪电
2009/6/22
密歇根大学的科研人员说，他们在火星发生沙尘暴时发现了电荷放电现象。密歇根大学的克里斯-鲁夫教授说火星上的闪电是“干”闪电——只打闪不下雨。“我们观测到在火星上由一次巨大的沙尘暴引起的一系列大规模、突然的放电现象。很明显火星上的放电现象并没有降雨伴随。然而，这种现象所揭示的各种可能性令人振奋。”
May 18, 2007，New research suggests that the water plumes seen on Enceladus may not require the presence of liquid water near the moon’s surface. However the moon may harbor a liquid ocean deep below i...
16 May 2007，A ring-shaped distribution of mass in a galaxy cluster five billion light-years from Earth is the strongest evidence yet for the existence of dark matter. This is the claim of physicists f...
US and UK pledge to work on new space exploration initiative
planetary explorations lunar science
2007/4/28
20 April 2007，NASA and the British National Space Centre (BNSC) have signed a historic agreement to jointly study how the two space agencies might work together on future planetary explorations to the...