⌛ 银河年 ↔ 回归年Galactic year (~230 Myr) to Tropical year
银河年与回归年互算（1 Gyr gal = 230039294.1 yr trop）。本地换算，附常用相关单位。Convert galactic year (~230 Myr) and tropical year (1 Gyr gal = 230039294.1 yr trop). Runs locally with related units.
点击任意一行可复制该结果；小于 0.0001 或不小于 10¹⁵ 的数值用 × 10ⁿ 科学计数法显示Click any row to copy that result. Values below 0.0001 or at least 10¹⁵ are shown in × 10ⁿ notation
使用说明与常见问题How-to & FAQ
「银河年 ↔ 回归年」是什么？What is the Galactic year (~230 Myr) to Tropical year tool?
银河年与回归年互算（1 Gyr gal = 230039294.1 yr trop）。本地换算，附常用相关单位。Convert galactic year (~230 Myr) and tropical year (1 Gyr gal = 230039294.1 yr trop). Runs locally with related units.
如何使用「银河年 ↔ 回归年」？How do I use the Galactic year (~230 Myr) to Tropical year tool?
在「银河年 ↔ 回归年」中输入数值并选择原单位，表格会同时列出换算到所有其他单位的结果，可一键复制。Enter a value in the Galactic year (~230 Myr) to Tropical year and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 银河年等于多少回归年？How many tropical year in 1 galactic year (~230 Myr)?
1 Gyr gal = 230039294.1 yr trop（按国际定义系数）。1 Gyr gal = 230039294.1 yr trop (international definition).
如何把银河年换算成回归年？How do I convert galactic year (~230 Myr) to tropical year?
结果 = 数值 × 230039294.1。例如 1 Gyr gal = 230039294.1 yr trop。result = value × 230039294.1. Example: 1 Gyr gal = 230039294.1 yr trop.
银河年/回归年属于哪类单位？What kind of units are galactic year (~230 Myr)/tropical year?
二者同属「时间」量纲，可安全互算；也可打开「time-unit-converter」做多单位对照。Both are time units; see also the time unit converter hub.
换算系数准确吗？Are the conversion factors exact?
「银河年 ↔ 回归年」采用国际单位制（SI）或公认标准中的定义值作为换算系数，结果保留约 10 位有效数字。The Galactic year (~230 Myr) to Tropical year uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「银河年 ↔ 回归年」免费吗？需要注册吗？Is the Galactic year (~230 Myr) to Tropical year free? Do I need an account?
「银河年 ↔ 回归年」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Galactic year (~230 Myr) to Tropical year is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.