星光m45的个人资料

尼康 z5 陪伴我的这一年 z5 入手将近一年，是时候发新人作品。。（长期更新）

C/2014 UN271 彗星界的巨无霸这个不明物体在星期三（6 月 23 日）才被确定为彗星，距天文学家首次在智利 Cerro Tololo 美洲天文台的暗能量相机的档案图像中观察到它是一个微小的移动点才仅一周。这颗彗星现在被称为彗星 C/2014 UN271，以发现者、宾夕法尼亚大学研究生佩德罗·伯纳迪内利和天文学家加里·伯恩斯坦的名字命名为伯纳迪内利-伯恩斯坦。该颗彗星直径达到 100km，它将在 2031 年 1 月 23 日到达近日点，届时它将刚好超出土星的轨道，大约是地球与太阳之间距离的 10.95 倍。新闻出处：space . com （好可惜，要是近日点达到 1 AU 肯定好看）

2021年新年快乐潜水党出来冒个泡

［讨论］彗星界的奇葩 17P/Holmes (2007) 之前这张f3彗星yy图我还觉得不可能发生，没想到 17p彗星彻底颠覆了我的认知

［新闻］科学家首次在彗星上发现极光 Data from NASA instruments aboard the ESA (European Space Agency) Rosetta mission have helped reveal that comet 67P/Churyumov-Gerasimenko has its own far-ultraviolet aurora. It is the first time such electromagnetic emissions in the far-ultraviolet have been documented on a celestial object other than a planet or moon. A paper on the findings was released today in the journalNature Astronomy. On Earth, aurora (also known as the northern or southern lights) are generated when electrically charged particles speeding from the Sun hit the upper atmosphere to create colorful shimmers of green, white, and red. Elsewhere in the solar system, Jupiter and some of its moons -- as well as Saturn, Uranus, Neptune, and even Mars -- have all exhibited their own version of northern lights. But the phenomena had yet to be documented in comets. Rosetta is space exploration's most traveled and accomplished comet hunter. Launched in 2004, it orbited comet 67P/Churyumov-Gerasimenko (67P/C-G) from Aug. 2014 until its dramatic end-of-mission comet landing in Sept. 2016. The data for this most recent study is on what mission scientists initially interpreted as "dayglow," a process caused by photons of light interacting with the envelope of gas -- known as the coma -- that radiates from, and surrounds, the comet's nucleus. But new analysis of the data paints a very different picture. "The glow surrounding 67P/C-G is one of a kind," said Marina Galand of Imperial College London and lead author of the study. "By linking data from numerous Rosetta instruments, we were able to get a better picture of what was going on. This enabled us to unambiguously identify how 67P/C-G's ultraviolet atomic emissions form." The data indicate 67P/C-G's emissions are actually auroral in nature. Electrons streaming out in the solar wind -- the stream of charged particles flowing out from the Sun -- interact with the gas in the comet's coma, breaking apart water and other molecules. The resulting atoms give off a distinctive far-ultraviolet light. Invisible to the naked eye, far-ultraviolet has the shortest wavelengths of radiation in the ultraviolet spectrum. Exploring the emission of 67P/C-G will enable scientists to learn how the particles in the solar wind change over time, something that is crucial for understanding space weather throughout the solar system. By providing better information on how the Sun's radiation affects the space environment they must travel through, such information could ultimately can help protect satellites and spacecraft, as well as astronauts traveling to the Moon and Mars. "Rosetta is the gift that keeps on giving," said Paul Feldman, an investigator on Alice at the Johns Hopkins University in Baltimore and a co-author of the paper. "The treasure trove of data it returned over its two-year visit to the comet have allowed us to rewrite the book on these most exotic inhabitants of our solar system -- and by all accounts there is much more to come." NASA Instruments Aboard ESA's Rosetta NASA-supplied instruments contributed to this investigation. The Ion and Electron Sensor (IES) instrument detected the amount and energy of electrons near the spacecraft, the Alice instrument measured the ultraviolet light emitted by the aurora, and the Microwave Instrument for the Rosetta Orbiter (MIRO) measured the amount of water molecules around the comet (the MIRO instrument includes contributions from France, Germany, and Taiwan). Other instruments aboard the spacecraft used in the research were the Italian Space Agency's Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS), the Langmuir Probe (LAP) provided by Sweden, and the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) provided by Switzerland. Rosetta was an ESA mission with contributions from its member states and NASA. Rosetta's Philae lander, which successfully landed on the comet in November 2014, was provided by a consortium led by the German Aerospace Center in Cologne; Max Planck Institute for Solar System Research in Gottingen, Germany; the French National Space Agency in, Paris; and the Italian Space Agency in Rome. A division of Caltech, NASA's Jet Propulsion Laboratory in Southern California managed the U.S. contribution of the Rosetta mission for NASA's Science Mission Directorate in Washington. JPL also built the MIRO and hosts its principal investigator, Mark Hofstadter. The Southwest Research Institute (San Antonio and Boulder, Colorado), developed the Rosetta orbiter's IES and Alice instruments and hosts their principal investigators, James Burch (IES) and Joel Parker (Alice). For more information on the U.S. instruments aboard Rosetta, visit:htt👍p://roset👍ta.jpl.nas👍a.go👍v More information about Rosetta is available at:ht👍tp://w👍ww.es👍a.in👍t/rosetta

（谍报）neowise发现一颗尚有潜力的彗星该彗星名为c/2020 p1 neowise 目前星等＋16，预计星等峰值为＋9（由于该彗星存在大量的不确定性，可能还会对曲线图进行修改）详情htt👍ps://thes👍kylive.co👍m/riseset?obj=c2020p1&geoid=4919466

（氵）中世纪到2020 彗星的mag图在twitter挖到的图，按照这频率，有生之年能不能看到负等彗星都是个问题

近期的 Neowise 彗星有人去拍吗老外的 Neowise 彗星照镇楼

大马国内物流有流通吗 rt，想在lazada上网购。。

潜水党的手机摄影图楼很久没发帖了，出来冒个泡。。发一下2017至2020年的照片。 2017年的城市风光镇楼

潜水党冒个泡，懒癌图楼低产，非原创会注明临摹

新年出来冒个泡。。。大家新年快乐

happy new year

圣诞快乐

【交流】如何3星 rt

有人吗。。。。。。￣▽￣

。我是来水贴的

【天文观测】3月9日日偏食。同学拍的

happy new year 我是第一个签到

新年快乐 happy new year 我是第一个签到

圣诞快乐

圣诞节快乐今天你们收到什么礼物

水母星云。水母星云离我们约 5 千光年远。它是泡泡状超新星遗骸IC443 的一部分是颗大质量恒星爆炸后所产生的扩张碎片云。而来自这个超新星爆炸的闪光, 大约在3 万多年前传到地球。拍摄者：Cesar Blanco Gonzalez Eg

祝活动星图一路走好虽然我不认识星图，但我祝他一路走好

居然还有这吧

新年快乐新年快乐，今年你们入了啥赤道仪

新人来此吧天文爱好者一枚

新人天文爱好者一枚，另外求罩