Copyright:Julien De Winter,
Sascha Ebeler
Text:
Keighley Rockcliffe
(NASA
GSFC,
UMBC CSST,
CRESST II)
中文翻譯:
今天的宇宙圖像中，有一些古老的東西，有一些新的東西，還有一些借來的東西，還有一些藍色的東西！彗星 R3 PanSTARRS 在圖片的右側慢慢移動，這顆彗星可能來自奧爾特雲，這意味著它是幾十億年前的太陽系古老遺物。它明亮的長長的離子尾巴發出藍色的光芒，因為從彗星核心逃出的氣體被陽光電離。天文學家們對彗星充滿好奇，原因有很多：彗星的成分是未被碰觸的時間膠囊，其中含有太陽系行星的組成部分；彗星可能把水帶給年輕的地球；彗星尾巴的行為可以幫助我們了解太陽風和輻射的互動。背景中展現的圖像是獵戶座星雲 (M42)，它是在彗星出現的第三夜拍的，這個星雲是我們最近的恆星誕生地，而它的年齡約為200萬年，相對來說算是新的！現在，這顆距離地球約1.275億公里的彗星 R3 PanSTARRS 正在離開太陽系，我們向它揮手告別。
原文:
Today’s composite image features something old, something new, something borrowed, and something blue! Comet R3 PanSTARRS, streaking across the right of the image, likely originated from the Oort Cloud, meaning it is an old Solar System relic from billions of years ago. It’s bright extended ion tail glows blue as the gas escaping the comet’s core is ionized by sunlight. Astronomers are fascinated by comets for all sorts of reasons: comet compositions are untouched time capsules containing the building blocks of Solar System planets; comets may have delivered water to the young Earth; the behavior of cometary tails shed light on solar wind and radiation interactions. The background mosaic, featuring the Orion Nebula (M42), was taken over two nights of observation with the comet captured on the third night. The Orion Nebula is our nearest stellar nursery and, at about 2 million years old, is our something (relatively) new! Now at around 127.5 million kilometers from Earth, we wave goodbye to the borrowed Comet R3 PanSTARRS as it leaves the Solar System. Growing Gallery: Comet R3 in 2026
來源:NASA每日圖片
