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人民日报再探神秘水星
水星探测器;行星探测
2021/11/19
近日,欧洲空间局和日本宇宙航空研究开发机构联合研制的“比皮科伦坡”水星探测器发射升空,预计飞行7年多后进入水星轨道,对水星展开迄今最为广泛和详尽的研究。
水星是一颗类地行星,被称为“第二地球”,但对于人类而言,它一直充满着神秘感;水星也是离太阳最近的行星,对它进行深度探测,有助于人们发现新的家园,也可以更好地理解太阳系的演化历史。然而,太阳表面近6000摄氏度的高温及其巨大的引力作用,对探测器进...
将人类送上月球是美国国家航空航天局(NASA)1958年10月1日正式成立时的首要目标之一。六十年沧桑砥砺,一甲子春华秋实。NASA不仅实现了载人登月的目标,还将其在载人飞行任务领域的视野扩展到了火星。
美国天文学家首次发现强有力证据,表明太阳系外也存在“月球”——围绕行星的卫星。它距地球约8000光年,围绕一个巨大的气态行星旋转。3日发表在美国《科学进展》杂志上的论文显示,研究人员用开普勒太空望远镜和哈勃太空望远镜发现了太阳系外恒星系统中这颗“月球”的踪迹。推测它体型巨大,直径与海王星相当,绕着巨大的气态行星开普勒1625b旋转,而这颗行星又绕着其母恒星开普勒1625旋转。
系外行星大气中首次发现铁
系外行星 大气 铁
2018/8/22
《自然》近日发表的一项研究确认在系外行星KELT-9b的大气中探测到铁和钛。KELT-9b属于超高温类木行星,这类行星是恒星和气态巨行星之间的过渡天体,天文学家此前曾预测KELT-9b的大气无云。虽然铁是丰度最高的过渡金属元素,但由于耐火性较好,天文学家从未在系外行星大气中直接探测到铁。不过,在高温状态下,大气中的铁和其他过渡金属元素并不以结合分子或云粒子的形式存在,而仅以原子的形式存在,天文学家...
Astronomers Create First Detailed Images Of Surface Of Giant Star(图)
Astronomers Create First Detailed Surface Of Giant Star
2018/2/1
An international team of astronomers has produced the first detailed images of the surface of a giant star outside our solar system, revealing a nearly circular, dust-free atmosphere with complex area...
Trickle-Down Is The Solution(To The Planetary Core Formation Problem)(图)
Trickle-Down The Solution The Planetary Core Formation
2017/12/19
Scientists have long pondered how rocky bodies in the solar system—including our own Earth—got their metal cores. According to research conducted by The University of Texas at Austin, evidence points ...
In October astronomers were surprised by a visitor that came racing into our Solar System from interstellar space. Now, researchers using the Gemini Observatory have determined that the first known ob...
地球独特构成源自诞生时的“大熔炉”
地球 行星 陨石
2017/9/28
在英国《自然》杂志2017年9月26日发表的两项独立行星科学研究中,科学家发现地球独特的化学构成可能源自星子(行星的前体)的熔岩挥发。这项发现有助于解释地球、火星和太阳系其它岩质天体的形成。
'First taste' video released from citizen science project capturing entire U.S. transit of solar eclipse(图)
First taste citizen science project entire U.S. transit solar eclipse
2017/9/5
For most Americans in the path of totality, Aug. 21 was spent in awe of the first transcontinental solar eclipse in 40 years. For the scientists and volunteers at the National Science Foundation (NSF)...
Spoiler Alert:Computer Simulations Provide Preview Of Solar Eclipse(图)
Spoiler Alert Computer Simulations Provide Preview Solar Eclipse
2017/9/5
On August 21, 2017, a total eclipse of the Sun will be visible across the U.S. The eclipse, which will trace out a 70-mile-wide band across 14 states, is generating excitement and motivating pilgrimag...
Spoiler Alert:Computer Simulations Provide Preview Of Upcoming Eclipse(图)
Spoiler Alert Computer Simulations Provide Preview Upcoming Eclipse
2017/9/5
A research team from Predictive Science Inc. (PSI) used the Stampede2 supercomputer at The University of Texas at Austin’s Texas Advanced Computing Center (TACC) to forecast the corona of the sun duri...
Primary mirror delivered to Daniel K. Inouye Solar Telescope(图)
Primary mirror Daniel K. Inouye Solar Telescope
2017/9/4
The primary mirror for the National Science Foundation (NSF) Daniel K. Inouye Solar Telescope (DKIST) -- the heart of this sophisticated instrument -- was successfully delivered Aug. 2 to its destinat...
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 ...
Researchers Detect Exoplanet with Glowing Water Atmosphere(图)
Researchers Detect Exoplanet Glowing Water Atmosphere
2017/9/1
Scientists have found compelling evidence for a stratosphere on an enormous planet outside our solar system. The planet’s stratosphere—a layer of atmosphere where temperature increases with higher alt...
类似木星的系外行星现身
木星 系外行星
2017/7/12
2017年7月9日,德国马克斯·普朗克天文学研究所(MPIA)的科学家发现了一颗罕见的大质量行星HIP 65426b,这颗类似木星的气态巨行星围绕一颗快速自旋的恒星旋转。研究人员表示,这颗在理论上不应该存在的新行星,将迫使他们反思目前的恒星和太阳系模型。