📏 光幺秒 ↔ 阿天文单位Light-yoctosecond to Atto-astronomical unit
光幺秒与阿天文单位互算（1 light-ys = 2.003988804e-09 aAU）。本地换算，附常用相关单位。Convert light-yoctosecond and atto-astronomical unit (1 light-ys = 2.003988804e-09 aAU). 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
「光幺秒 ↔ 阿天文单位」是什么？What is the Light-yoctosecond to Atto-astronomical unit tool?
光幺秒与阿天文单位互算（1 light-ys = 2.003988804e-09 aAU）。本地换算，附常用相关单位。Convert light-yoctosecond and atto-astronomical unit (1 light-ys = 2.003988804e-09 aAU). Runs locally with related units.
如何使用「光幺秒 ↔ 阿天文单位」？How do I use the Light-yoctosecond to Atto-astronomical unit tool?
在「光幺秒 ↔ 阿天文单位」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 Light-yoctosecond to Atto-astronomical unit and choose the source unit; the table shows the value in every other unit at once, ready to copy.
1 光幺秒等于多少阿天文单位？How many atto-astronomical unit in 1 light-yoctosecond?
1 light-ys = 2.003988804e-09 aAU（按国际定义系数）。1 light-ys = 2.003988804e-09 aAU (international definition).
如何把光幺秒换算成阿天文单位？How do I convert light-yoctosecond to atto-astronomical unit?
结果 = 数值 × 2.003988804e-09。例如 499004783.8 light-ys = 0.9999999999 aAU。result = value × 2.003988804e-09. Example: 499004783.8 light-ys = 0.9999999999 aAU.
光幺秒/阿天文单位属于哪类单位？What kind of units are light-yoctosecond/atto-astronomical unit?
二者同属「长度」量纲，可安全互算；也可打开「length-converter」做多单位对照。Both are length units; see also the length converter hub.
换算系数准确吗？Are the conversion factors exact?
「光幺秒 ↔ 阿天文单位」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 Light-yoctosecond to Atto-astronomical unit uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「光幺秒 ↔ 阿天文单位」免费吗？需要注册吗？Is the Light-yoctosecond to Atto-astronomical unit free? Do I need an account?
「光幺秒 ↔ 阿天文单位」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 Light-yoctosecond to Atto-astronomical unit is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.