2023-11-20 16:47:43时空
追踪真空的量子闪烁

Absolutely empty -- that is how most of us envision the vacuum. Yet, in reality, it is filled with an energetic flickering: the quantum fluctuations. Experts are currently preparing a laser experiment intended to verify these vacuum fluctuations in a nove

阅读全文
2023-11-20 16:47:42时空
银河系的“光剑”:回答关于黑洞喷流的长期问题

The one thing everyone knows about black holes is that absolutely everything nearby gets sucked into them.

阅读全文
2023-11-20 16:47:41时空
利用日食计算土星环的透明度

A Lancaster University PhD student has measured the optical depth of Saturn's rings using a new method based on how much sunlight reached the Cassini spacecraft while it was in the shadow of the rings.

阅读全文
2023-11-20 16:47:41时空
从云层上方下载美国国家航空航天局的暗物质数据

Data from a NASA mission to map dark matter around galaxy clusters has been saved by a new recovery system designed by scientists at the University of Sydney. The system allowed the retrieval of gigabytes of information, even after communication failed an

阅读全文
2023-11-20 16:47:40时空
龙谷样品中核合成同位素变化的起源探讨

The observed variations in chromium (Cr) isotope ratios in the Ryugu asteroid samples collected by Hayabusa2 likely resulted from elemental redistribution of slightly soluble Cr by water within the parent body, reveals a multinational study led by researc

阅读全文
2023-11-20 16:47:40时空
一颗具有环状结构的老恒星:ALMA展示了迄今为止最高的分辨率

ALMA (Atacama Large Millimeter/submillimeter Array) has demonstrated the highest resolution yet with observations of an old star. The observations show that the star is surrounded by a ring-like structure of gas and that gas from the star is escaping to t

阅读全文
2023-11-20 16:47:39时空
一种新型无人车防滑系统

Given the hostile conditions of extraterrestrial environments, unmanned rovers play a critical role in the exploration of planets and moons. NASA's Mars and lunar exploration rovers have significantly contributed to our understanding of these extraterres

阅读全文
2023-11-20 16:47:38时空
早期宇宙中发现的类银河系

Using the James Webb Space Telescope, an international team, including astronomer Alexander de la Vega of the University of California, Riverside, has discovered the most distant barred spiral galaxy similar to the Milky Way that has been observed to date

阅读全文
2023-11-20 16:47:38时空
地球深处有一颗古老行星的遗迹

In the 1980s, geophysicists made a startling discovery: two continent-sized blobs of unusual material were found deep near the center of the Earth, one beneath the African continent and one beneath the Pacific Ocean. Each blob is twice the size of the Moo

阅读全文
2023-11-20 16:47:37时空
詹姆斯·韦伯太空望远镜发现的第二遥远星系

The second- and fourth-most distant galaxies ever observed have been discovered in a region of space known as Pandora's Cluster, or Abell 2744, using data from NASA's James Webb Space Telescope (JWST). Following up on a deep field image of the area, an

阅读全文
2023-11-20 16:47:36时空
詹姆斯·韦伯太空望远镜探测到附近系外行星大气层中的水蒸气、二氧化硫和沙云

A team of European astronomers, co-led by researchers from the Institute of Astronomy, KU Leuven, used recent observations made with the James Webb Space Telescope to study the atmosphere of the nearby exoplanet WASP-107b. Peering deep into the fluffy atm

阅读全文
2023-11-20 16:47:35时空
“跳动”的彗星可以为系外行星提供生命的基石

How did the molecular building blocks for life end up on Earth? One long-standing theory is that they could have been delivered by comets. Now, researchers from the University of Cambridge have shown how comets could deposit similar building blocks to oth

阅读全文
 292   首页 上一页 22 23 24 25 下一页 尾页