搜索结果: 1-15 共查到“星系与宇宙学 Galaxies”相关记录217条 . 查询时间(0.25 秒)
Astronomers discover metal-rich galaxies in early universe
宇宙 富含金属 星系
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2023/5/17
Scanning the first images of a well-known early galaxy taken by NASA’s James Webb Space Telescope (JWST), Cornell astronomers were intrigued to see a blob of light near its outer edge.
Chasing data: Astronomers race to explore ancient galaxies（图）
追逐数据 天文学 古代星系
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2023/5/22
On the evening of Dec. 12, 2021, Cornell astronomers Gordon Stacey and Thomas Nikola were dangerously short on time. They’d been awake for nearly 24 hours, with another all-nighter ahead of them.
How fast is the universe expanding? Galaxies provide one answer（图）
universe expanding Galaxies answer
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2021/4/9
Determining how rapidly the universe is expanding is key to understanding our cosmic fate, but along with more precise data comes a conundrum. Estimates based on measurements in our current universe d...
Sky survey reveals newborn jets in distant galaxies（图）
Sky survey newborn jets distant galaxies
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2020/12/11
Astronomers using data from the ongoing VLA Sky Survey have found distant galaxies with supermassive black holes at their cores that have launched powerful, radio-emitting jets of material w...
Spiraling filaments feed young galaxies（图）
Spiraling filaments young galaxies
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2019/10/23
Galaxies grow by accumulating gas from their surroundings and converting it to stars, but the details of this process have remained murky. New observations, made using the Keck Cosmic Web Imager at th...
Massive Primordial Galaxies Found In ‘Halo’ Of Dark Matter（图）
Massive Primordial Galaxies Halo Dark Matter
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2017/12/19
Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scienti...
Quasars may answer how starburst galaxies were extinguished
Quasars answer starburst galaxies extinguished
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2017/9/1
Some of the biggest galaxies in the universe are full of extinguished stars. But nearly 12 billion years ago, soon after the universe first was created, these massive galaxies were hotspots that brewe...
Reconciling dwarf galaxies with dark matter
dwarf galaxies dark matter
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2016/9/12
Dwarf galaxies are enigmas wrapped in riddles. Although they are the smallest galaxies, they represent some of the biggest mysteries about our universe. While many dwarf galaxies surround our own Milk...
Dark Energy Measured with Record-Breaking Map of 1.2 Million Galaxies
Dark Energy Measured Record-Breaking Map 1.2 Million Galaxies
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2016/8/1
A team of hundreds of physicists and astronomers have announced results from the largest-ever, three-dimensional map of distant galaxies. The team constructed this map to make one of the most precise ...
Looking at the earliest galaxies
earliest galaxies
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2015/11/12
Before light travelled across it, the universe was a dark place. For about a billion years after the Big Bang, the cosmos was cloaked in a thick fog of hydrogen gas that kept light trapped. But as ear...
VLA Reveals Spectacular "Halos" of Spiral Galaxies
VLA Halos Spiral Galaxies
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2015/11/13
A study of spiral galaxies seen edge-on has revealed that "halos" of cosmic rays and magnetic fields above and below the galaxies' disks are much more common than previously thought.An international t...
Pairs of Supermassive Black Holes in Galaxies May Be Rarer Than Previously Thought（图）
Supermassive Black Holes Galaxies Previously Thought
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2015/9/25
There may be fewer pairs of supermassive black holes orbiting each other at the cores of giant galaxies than previously thought, according to a new study by astronomers who analyzed data from the Nati...
NOAO:Hiding in Plain Sight:Undergraduates Discover the Densest Galaxies Known
NOAO Hiding in Plain Sight Undergraduates Densest Galaxies Known
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2015/8/4
Two undergraduates at San José State University have discovered two galaxies that are the densest known. Similar to ordinary globular star clusters but a hundred to a thousand times brighter, the new ...
Sub-mm Galaxies in Cosmological Simulations
Sub-mm Galaxies Cosmological Simulations
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2014/12/26
We study the predicted sub-mm emission from massive galaxies in a Lambda-CDM universe, using hydrodynamic cosmological simulations. Assuming that most of the emission from newly formed stars is absorb...
Cooling radiation and the Ly alpha luminosity of forming galaxies
formation ISM
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2014/12/26
We examine the cooling radiation from forming galaxies in hydrodynamic simulations of the LCDM model (cold dark matter with a cosmological constant), focusing on the Lyα line luminosities of high-reds...