搜索结果: 1-15 共查到“天文学 earth”相关记录82条 . 查询时间(0.078 秒)
中国科学院广州地球化学研究所刘亮等-Communications Earth & Environment：板块间横向挤压在伊豆-小笠原-马里亚纳俯冲起始中的关键作用（图）
刘亮 岩浆 演化 数值
2024/5/21
大洋板块俯冲是地球浅表最具代表性的地质过程之一。理论上来讲，大洋板块在形成之后的20-40 Myr内，就已经具备了发生俯冲的密度等自身属性条件。然而，50%以上的大西洋板块形成于40 Ma之前，至今却几乎没有发生俯冲；位于地中海东部的部分大洋块体甚至已在地表存在了3亿年之久。因此，除了大洋板块自身的属性外，新俯冲的开启往往还伴随某种外部因素的存在、以打破大洋板块与上盘之间的平衡状态，如：横向或纵向...
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
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...
When it comes to directly imaging Earth-like exoplanets orbiting faraway stars, seeing isn’t always believing.
Highest-resolution measurements of asteroid surface temperatures ever obtained from Earth
asteroid belt solar system surface temperature
2021/8/9
A close examination of the millimeter-wavelength emissions from the asteroid Psyche, which NASA intends to visit in 2026, has produced the first temperature map of the object, providing new insight in...
Solving solar puzzle could help save Earth from planet-wide blackouts
space weather prediction convection sunspots
2021/8/6
Understanding the Sun's magnetic dynamo could help predict solar weather, such as potentially dangerous geothermal storms, solar flares and sunspots. Mathematicians have proposed a new model of the Su...
Scientists at Cornell and the American Museum of Natural History have identified 2,034 nearby star-systems – within the small cosmic distance of 326 light-years – that could find Earth merely by watch...
From stardust to pale blue dot:Carbon's interstellar journey to Earth（图）
From stardust pale blue dot Carbon interstellar journey Earth
2021/4/16
We are made of stardust, the saying goes. U.S. National Science Foundation-funded research at the University of Michigan reveals that the statement may be more true than we thought.The ...
Scientists find closest known asteroid to fly by Earth（图）
Scientists closest known asteroid fly by Earth
2020/8/27
On August 16, 2020, the Zwicky Transient Facility, a robotic survey camera located at the Palomar Observatory near San Diego, spotted an asteroid that had, just hours earlier, traveled only 1,830...
Earth's mantle, not its core, may have generated planet's early magnetic field（图）
Earth's mantle generated planet early magnetic field
2020/3/13
New research lends credence to an unorthodox retelling of the story of early Earth that was first proposed by a geophysicist at the Scripps Institution of Oceanography in La Jolla, Californi...
ILLUMINATION INVARIANT CHANGE DETECTION (IICD): FROM EARTH TO MARS
Illumination Planetary Surface Change Detection Phase Correlatio Saliency Active Contour
2018/5/15
Multi-temporal Earth Observation and Mars orbital imagery data with frequent repeat coverage provide great capability for planetary surface change detection. When comparing two images taken at differe...
NSF-supported scientists present research results on Earth's critical zone at 2017 AGU fall meeting（图）
NSF scientists Earth's critical zone 2017 AGU fall meeting
2017/11/24
Find related stories on NSF's Critical Zone Observatories at this link.The thin veneer of Earth's surface that stretches from the top of the forest canopy to the base of bedrock is known as the "criti...
New Gravitational Wave Hits Earth--For The First Time,3 Detectors Zoom In On Its Location（图）
New Gravitational Wave Earth The First Time 3 Detectors Zoom On Its Location
2017/10/24
For the first time, three detectors have tracked the gravitational waves emitted by a merger of two black holes -- a critical new capability that allows scientists to more closely locate a gravitation...
Observatory Detects Extragalactic Cosmic Rays Hitting The Earth（图）
Observatory Detects Extragalactic Cosmic Rays Hitting Earth
2017/10/24
Fifty years ago, scientists discovered that the Earth is occasionally hit by cosmic rays of enormous energies. Since then, they have argued about the source of those ultra-high-energy cosmic rays—whet...
Eclipse to Shed Light on Weather in Space and on Earth（图）
eclipse Shed Light on Weather Space Earth
2017/9/4
When a total solar eclipse sweeps across U.S. skies on Monday, Aug. 21, UMass Lowell faculty and students will be stationed around the country, conducting research that will be used to better predict ...
UA Astronomers Track the Birth of a ‘Super-Earth’（图）
UA Astronomers Track the Birth Super-Earth
2017/7/24
A new model giving rise to young planetary systems offers a fresh solution to a puzzle that has vexed astronomers ever since new detection technologies and planet-hunting missions such as NASA's ...