This page describes an image Pioggia di meteore Geminidi dalla Cina, di Dai Jianfeng, Cina
Image caption:
Primo posto al concorso di astrofotografia IAU OAE 2021, categoria Piogge meteoriche.
Una pioggia di meteoriti si verifica quando la Terra, nella sua orbita intorno al Sole, attraversa una scia di detriti lasciata in precedenza da una cometa nel suo avvicinamento al Sole. Quando la Terra entra in contatto con questi detriti (delle dimensioni di piccoli granelli di sabbia), essi entrano nell'atmosfera ad alta velocità e su traiettorie parallele, bruciando completamente e lasciando bellissime tracce (strisce) nel cielo. Queste strisce possono apparire e scomparire in un batter d'occhio, o durare molto più a lungo. In rare occasioni i detriti provengono da asteroidi, come nel caso della pioggia di meteore Geminidi, mostrata in questa immagine, che raffigura molte strisce di detriti catturate nel cielo della Cina nel 2017. A causa dei moti relativi e della prospettiva, la pioggia sembra provenire da un unico punto, noto come punto radiante, splendidamente rappresentato in questa immagine. È un po' come guidare in auto in una giornata di pioggia senza vento: guardando fuori dal parabrezza sembra che la pioggia arrivi direttamente verso il vetro, mentre in realtà sta cadendo verticalmente verso il basso.
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Image credit:
Dai Jianfeng/IAU OAE
Stato di traduzione della didascalia: Approvato da un revisore
traduttori della didascalia: Giuliana Giobbi, Francesco Salvestrini
revisori della didascalia: Rosa Valiante, Rodolfo Canestrari
DOI: 10.5281/zenodo.5367235
Termini di glossario connessi:
Stella cadente
Categorie:
Astronomia ad occhio nudo
Image license: Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Didascalie in lingue diverse:
Image caption: ২০২১ আইএইউ ওএই অ্যাস্ট্রোফটোগ্রাফি প্রতিযোগিতায় প্রথম স্থান, বিভাগে উল্কা ঝরনা।
একটি উল্কাবৃষ্টি ঘটে যখন পৃথিবী সূর্যের চারপাশে তার কক্ষপথে, সূর্যের চারপাশে একটি ধূমকেতু দ্বারা পূর্বে রেখে যাওয়া একটি ধ্বংসাবশেষের পথ অতিক্রম করে। পৃথিবী যখন এই ধ্বংসাবশেষে প্রবেশ করে (ছোট বালির দানার আকারের), তারা উচ্চ গতিতে এবং সমান্তরাল ট্র্যাজেক্টোরিতে বায়ুমণ্ডলে প্রবেশ করে, আকাশে সুন্দর ট্র্যাকগুলি (স্ট্রিকগুলি) রেখে সম্পূর্ণরূপে জ্বলতে থাকে। এই রেখাগুলি চোখের পলকে দেখা দিতে পারে এবং অদৃশ্য হয়ে যেতে পারে বা অনেক দিন স্থায়ী হতে পারে। বিরল অনুষ্ঠানে ধ্বংসাবশেষ গ্রহাণু থেকে উদ্ভূত হয়, যেমন জেমিনিড উল্কা ঝরনার ক্ষেত্রে, এই ছবিতে দেখানো হয়েছে, ২০১৭ সালে চীনের আকাশে বন্দী ধ্বংসাবশেষের অনেক রেখাচিত্র। একটি একক বিন্দু থেকে, যা দীপ্তিমান বিন্দু হিসাবে পরিচিত, এই ছবিতে সুন্দরভাবে চিত্রিত হয়েছে৷ এটি বৃষ্টির দিনে কোনও বাতাস ছাড়াই গাড়ি চালানোর মতো, সামনের জানালা দিয়ে তাকালে মনে হয় বৃষ্টি সরাসরি জানালার দিকে আসছে, যখন আসলে বৃষ্টি খাড়াভাবে নীচের দিকে পড়ছে।
Image credit: দাই জিয়াংফেং/আইএইউ ওএই
Termini di glossario connessi: Shooting Star Caption translation status: Non ancora approvato da un revisore
Caption translators: Raktim Mukherjee
Image caption: First place in the 2021 IAU OAE Astrophotography Contest, category Meteor showers.
A meteor shower occurs when the Earth in its orbit around the Sun, passes through a debris trail left previously by a comet on its approach around the Sun. As the Earth enters this debris (small sand grain sized), they enter the atmosphere at high speeds and on parallel trajectories, burning completely leaving beautiful tracks (streaks) in the sky. These streaks can appear and disappear in the blink of an eye, or last much longer. On rare occasions the debris originates from asteroids, as in the case of the Geminid meteor shower, shown in this image, picturing many streaks of debris captured in the sky of China in 2017. Due to relative motions and perspective, the shower appears to come from one single point, known as the radiant point, beautifully pictured in this image. This is similar to driving in a car on a rainy day without any wind, looking out the front window it seems that the rain is coming directly towards the window, when in fact the rain is falling vertically downwards.
Image credit: Dai Jianfeng/IAU OAE
Termini di glossario connessi: Shooting Star
Image caption: 2021 年国际天文学联合会 OAE 天文摄影比赛流星雨类第一名。
地球在围绕太阳的轨道上运行，当它穿过彗星接近太阳留下的碎片轨迹时，就会发生流星雨。当地球穿过这些碎片（小沙粒大小）时，它们高速地沿着平行轨迹进入大气层，完全燃烧，在天空中留下美丽的轨迹（条纹）。这些条纹可以一眨眼间出现和消失，也可以持续更长时间。在极少数情况下，碎片来源于小行星，如双子座流星雨，照片展示的就是 2017 年在中国的天空捕捉到的许多碎片条纹。由于相对运动和视角，流星雨似乎来自一个点，即所谓的辐射点，就像照片展示的那样。这就好比在无风的雨天开车，从前窗望出去，雨水似乎是直接冲着车窗来的，而实际上雨水是垂直落下的。
Image credit: Dai Jianfeng/IAU OAE
Termini di glossario connessi: Shooting Star Caption translation status: Non ancora approvato da un revisore
Caption translators: Hu Xueying
Image caption: 2021 年國際天文學聯合會 OAE 天文攝影比賽流星雨類第一名。
地球在圍繞太陽的軌道上運行，當它穿過彗星接近太陽留下的碎片軌跡時，就會發生流星雨。當地球穿過這些碎片（小沙粒大小）時，它們高速地沿著平行軌跡進入大氣層，完全燃燒，在天空中留下美麗的軌跡（條紋）。這些條紋可以一眨眼間出現和消失，也可以持續更長時間。在極少數情況下，碎片來源於小行星，如雙子座流星雨，照片展示的就是 2017 年在中國的天空捕捉到的許多碎片條紋。由於相對運動和視角，流星雨似乎來自一個點，即所謂的輻射點，就像照片展示的那樣。這就好比在無風的雨天開車，從前窗望出去，雨水似乎是直接沖著車窗來的，而實際上雨水是垂直落下的。
Image credit: Dai Jianfeng/IAU OAE
Termini di glossario connessi: Shooting Star Caption translation status: Non ancora approvato da un revisore
Caption translators: An automated transliteration from the simplified Chinese translation by - Hu Xueying
