K 2 - 315 b 的一年
A Year for K2-315b

發表日期:2026-03-14
想探訪一顆一年只有 3 . 14 天的行星嗎?那就計劃一次前往K 2 - 315 b 的旅程吧——這是一顆地球大小的行星,每 3 . 14 天左右繞一顆低溫的紅色M 型矮星公轉一圈。 這顆系外行星的發現基於行星搜尋者“開普勒”太空望遠鏡K 2 擴充套件任務的公開資料,於 2020 年公佈。K 2 - 315 b 測得的公轉週期(以天為單位)幾乎等於廣為人知的無理數π。這意味著該系外行星距離其母星非常近,其表面溫度可能極高,實際上熱得像烤箱一樣。 而且這顆“π行星”距離我們超過 185 光年。因此,與其費心安排一次前往K 2 - 315 b 的星際度假,不如在地球上尋找更輕鬆、更舒適的方式來慶祝“π日”。
原文:Want to visit a planet that has 3.14 days in a year? Then plan a trip to K2-315b, an earth-sized planet orbiting around a cool, red, M dwarf star about once every 3.14 days. The exoplanet's discovery, based on publicly available data from the planet-hunting Kepler Space Telescope's extended K2 mission, was announced in 2020. K2-315b's measured orbital period in days is nearly equal to the extremely popular irrational number Pi. That puts the exoplanet so close to its parent star that its surface is likely very warm, baking-hot in fact. And this Pi planet is over 185 light-years away. So instead of trying to arrange for an interstellar vacation to K2-315b, there may be easier and more comfortable ways for you to celebrate Pi day on planet Earth.
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。