Astronomers also use another unit called a parsec.

天文学家还会使用另一种单位——秒差。

At 8 parsecs you need exactly 1.

在 8 秒差距时， 你正好需要 1。

Sometimes we also use a unit called a parsec, which is equal to 3.26 light years.

有时我们也使用一个称为秒差距的单位， 它等于 3。26 光年。

But the space station is 23 parsecs away, and there’s only empty space between there and here.

但是空间站距离我们有 23 秒差距，那里和这里之间只有空旷的空间。

But the space station is 23 parsecs away, and there's only empty space between there and here.

但是空间站距离我们有 23 秒差距，那里和这里之间只有空旷的空间。

With some strategic fuel caching along the way, you might be able to make it all 23 parsecs.

沿途使用一些战略性的燃料缓存，您可能能够完成 23 秒差距。

To reach 23 parsecs, you'll have to leave the 8-parsec mark with a full tank of fuel.

要达到 23 秒差距，您必须在满油箱的情况下离开 8 秒差距标记。

Since 15 units divided by 3 trips is 5, we can place these two cache points 5 parsecs apart.

由于 15 个单元除以 3 个行程是 5，我们可以将这两个缓存点相隔 5 个秒差距。

They use a distance called the parsec (a contraction of parallax and second), based on a universal measure called the stellar parallax and equivalent to 3.26 light-years.

他们用的距离单位是“秒差距”基于一种普遍使用的、名叫恒视差的量度方法，相当于3.26光年。

You jump 3 parsecs, drop 9 units off at the cache point, and then jump the 3 units home, arriving with an empty tank.

你跳了 3 个秒差距， 在缓存点放下 9 个单位，然后将这 3 个单位跳回家， 带着一个空罐到达。

Of the more than 330,000 stars in the Gaia catalogue that are within 100 parsecs of Earth, just 2,043 happen to have the perfect viewing geometry.

在盖亚目录中距地球 100 秒差距以内的 330, 000 多颗恒星中，只有 2,043 颗恰好具有完美的观测几何形状。

Your ship's faster-than-light jump drive consumes 1 unit of fuel for every parsec of distance it takes you, and your ship holds only 15 units of fuel.

您的飞船的超光速跳跃引擎每行驶 1 秒差距消耗 1 个单位的燃料，而您的飞船仅能容纳 15 个单位的燃料。

You scoff, remembering that a parsec is a unit of distance, not time, when suddenly your ship powers down and a boarding party is beating down the outside hatch.

你嗤之以鼻， 记住秒差距是距离单位，而不是时间，突然你的船停电了， 登船队正在敲打外面的舱口。

You'd have 2 tanks of fuel at point X, and need 1 left at the 8 parsec cache point, so you can spend one tank-- or 15 units-- going back and forth.

你在 X 点有 2 箱燃料，在 8 秒差距的缓存点还需要 1 箱， 所以你可以花一箱——或 15 个单位——来回。

You’d have 2 tanks of fuel at point X, and need 1 left at the 8 parsec cache point, so you can spend one tank-- or 15 units-- going back and forth.

你在 X 点有 2 箱燃料， 在 8 秒差距的缓存点还需要 1 箱，所以你可以花一箱——或 15 个单位——来回。

Of those stars, the authors further identified 75 that are close enough — within 30 parsecs — for radio waves from Earth to already have washed over them since humans started to produce them.

在这些恒星中， 作者进一步确定了 75 颗足够近——在 30 秒差距内——自人类开始制造它们以来， 来自地球的无线电波已经冲刷过它们。