他突然想到，烟火也许可以有效地展现恒星是如何形成的。
It occurred to him that fireworks might provide an effective way of demonstrating how stars were formed.
比如说，我们怎么知道恒星真的是像太阳一样巨大的火球，而且离我们很远呢？
How do we know, for example, that the stars are really huge balls of fire like the Sun and very far away?
碰撞很快耗尽了所有的反物质，只留下足够的物质，来创造恒星、行星和最终的我们。
The collisions quickly depleted all the anti-matter and left just enough matter to create stars, planets, and eventually us.
地心论是指以地球为中心，所以地心论认为，太阳、行星和恒星都围绕着地球旋转，而地球是静止的。
Geocentric means Earth-centered, so the geocentric view holds that the Sun, the planets, and the stars, all revolve around the Earth, which is stationary.
冬季六边形包括一些可见的最亮的恒星，它们在地球北半球的冬季天空中形成了一个大而容易辨认的图案。
The Winter Hexagon involves some of the brightest stars visible, forming a large and easily found pattern in the winter sky of Earth's northern hemisphere.
1977年发射的“旅行者一号”太空探测器发回了木星和土星的壮观图像，然后飞出太阳系，执行前往恒星的单程任务。
The space probe, Voyager I, launched in 1977, had sent back spectacular images of Jupiter and Saturn and then soared out of the Solar System on a one-way mission to the stars.
太阳一类的恒星在其核心将氢聚变成氦。
Stars like our sun fuse hydrogen in their cores into helium.
今天我想谈谈恒星对早期航海者的重要性，以及恒星的固定模式是如何被用作助航工具的。
Today I want to talk about the importance of stars for early seafarers, about how the fixed patterns of stars were used as navigational aids.
天文学家用星等和光度来描述恒星的亮度。
Astronomers describe star brightness in terms of magnitude and luminosity.
望远镜照片展示这个壮观星团的数十万恒星。
Telescopic views reveal the spectacular cluster's hundreds of thousands of stars.
由恒星组成的桥梁将这三个星系联结在了一起。
伽利略还发现银河系其实是由数百万的恒星组成的。
Galileo also observed that the Milky Way was in fact made up of many millions of individual stars.
距太阳第二近的恒星是比邻星，距离为4.2光年。
The next-closest known star to the Sun is Proxima Centauri, located 4.2 light years away.
这个柱体注定要进化成无数恒星，甚至有可能孕育行星。
The column is destined to evolve into countless stars, and perhaps even generate some planets.
“我想找到这些恒星，因为我想回顾过去。”弗雷·贝尔说。
"I want to find these stars because I want to look back in time," says Frebel, now at the Harvard-Smithsonian Center for Astrophysics.
恒星的表面温度部分取决于它的质量，并影响它的亮度和颜色。
The surface temperature of a star depends in part on its mass and affects its brightness and color.
重组的图像既突出富于恒星的星野，也能展现彗星暗弱的细节。
The recombined frames show off both the rich star field and faint details of the comet.
天文学家已经探测到太阳系外超过四百颗环绕恒星运行的行星。
Astronomers have detected more than 400 planets orbiting stars beyond our solar system.
这些由银河系众多恒星锻造出的重元素正是类地行星的构建模块。
Forged by the Milky Way's abundant stars, such heavy elements are the building blocks of terrestrial planets.
被新生恒星加热的炙热尘埃沿着细长的悬臂一直盘旋到星系中心。
The hot dust, which is being heated by newborn stars, traces the spidery arms all the way to the center of the galaxy.
但我们也不用因此就放弃探索这个行星和其恒星系的计划。
But we shouldn't scrap plans to explore the planet and its solar system just yet.
核聚变是发生在恒星内部的原子核融合，是地球上长期追求的目标。
Nuclear fusion - the melding of atomic nuclei that happens inside stars - is a long-sought goal on Earth.
主盘包含着太阳及星系里其他大部分的恒星，当然还有美丽的旋臂。
The disc harbours the Sun and most of the galaxy's other stars, as well as the beautiful spiral arms.
画面突出了一湾安静的泻湖，地面轻雾，两个星系，和上万颗恒星。
The frame is highlighted by a quiet lagoon, soft ground fog, two galaxies, and tens of thousands of stars.
不过，星系中的气体却会碰撞，于是恒星形成的“雪崩”过程开始了。
The gas within galaxies, however, does collide, and an avalanche of star formation commences.
的确，就在50光年之外的一个恒星系统中，可能发生过类似的情况。
Indeed, something similar may have happened in a solar system just 50 light-years away.
的确，就在50光年之外的一个恒星系统中，可能发生过类似的情况。
Indeed, something similar may have happened in a solar system just 50 light-years away.
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