Rare 170,000-Year Comet Visible in Northern Hemisphere
罕見的 17 萬年彗星現身北半球
In April 2026, stargazers were treated to a rare celestial event: the appearance of C/2025 R3, nicknamed the 170,000-year comet.
2026年4月，天文觀測者們迎來了一場罕見的天文事件：C/2025 R3彗星的出現，它被暱稱為「17萬年一遇的彗星」。
First identified by the Pan-STARRS survey in Hawaii in September 2025, this icy visitor travels from the distant Oort Cloud.
這顆冰冷的訪客最初於2025年9月由夏威夷的泛星計畫（Pan-STARRS）觀測巡天所發現，來自遙遠的歐特雲（Oort Cloud）。
Its orbital path is so vast that it only enters our inner solar system once every 170,000 years, meaning the last time it passed by, humanity was still in the Paleolithic era.
其軌道極其廣闊，每17萬年才會進入內太陽系一次，這意味著它上次經過時，人類還處於舊石器（ㄕˊㄑㄧˋ）時代。
Observers noted its unique greenish coma, caused by its chemical composition.
觀測者們注意到它獨特的綠色彗髮（ㄏㄨㄟˋㄈㄚˋ），這是由其化學成分所致。
For those in the Northern Hemisphere, the peak viewing window occurred around April 19, 2026, when the comet reached its perihelion.
對於北半球的觀測者而言，最佳觀測窗口出現在2026年4月19日前後，當時彗星到達了近日點（ㄐㄧㄣˋㄖˋㄉㄧㄢˇ）。
Observers looked toward the eastern horizon before sunrise, using binoculars to spot the faint, diffuse glow near the constellation Pegasus.
觀測者們在日出前看向東方地平線，並使用雙筒望遠鏡在飛馬座（ㄆㄟㄇㄚˇㄗㄨㄛˋ）附近尋找那微弱且瀰漫的光輝。
After its brief visit, the comet transitioned toward the Southern Hemisphere, continuing its long journey back into the depths of space.
短暫造訪後，這顆彗星便轉向南半球，繼續它重返太空深處的漫長旅程。
