The nearest star to earth is about 4 light years away.
地球离最近的恒星大约为4光年。
The distance can be expressed in light years.
距离可以用光年表示.
Observers have recently found in the Universe giant voids about 500,000,000 light-years across.
观察员最近在宇宙中发现了直径约5亿光年的巨型空洞。
This law is known to hold true for galaxies at a distance of at least several billion light years.
据知，这条定律同样适用于距离至少几十亿光年之远的星系。
The distance can be expressed in light-years.
距离可以用光年表示。
Some of them are a million light - years away .
有些是在一百万 光年 之外.
He was light years distant, but O'Brien was still standing at his side.
他已在光年的距离之外, 但是奥勃良仍站在他旁边.
In the year 296,036 , Voyager 2 will pass within 4.3 lightyears of Sirius.
在296036年, “旅行者2号”将在4.3光年的距离范围内通过天狼星.
They lead to the Orion star system three million light - years away .
他们去了离此三百万 光年 远的猎户星座.
The Crab Nebula lies about 6, 500 light - years away in the constellation Taurus.
蟹状星云距离金牛座大约6, 500 光年 远.
The measure range of this astronomical measurement apparatus is calculated in light - years .
这台天文测量仪的量程是以 光年 计算的.
Fighting gravitational clumping would take a wavelength of a few dozen light - years .
为了对抗重力造成的聚集,这些粒子的波长可能会长达好几十 光年 的距离.
Any new earth would probably be at least 500 light years away.
就算发现了“新地球”,很可能也是在500光年之外.
The inner region of the galaxy is pictured, spanning about 10,000 light - years .
这张照片显示星系中心区域, 宽约10,000 光年.
The galactic center lies some 26,000 light - years away , toward the constellation Sagittarius.
银河系中心位于人马座,距离我们约26000 光年.