天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。
Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.
这是由万有引力作用产生的吗？
就是说，有较弱的引力作用。
这个速度理论上与黑洞的引力作用直接相关。
The motions are directly related to the gravitational pull of the black hole.
潮汐是月亮引力作用的结果。
计算得把太阳和各行星的引力作用考虑进去。
The calculations have to factor in the gravitational tug of the sun and the planets.
光的扭曲越大，星系的本身及其暗物质的引力作用则越大。
The larger the distortion, the stronger the gravitational tug of the intervening galaxy's ordinary and dark matter.
大量尘埃积聚的区域里，彼此间引力作用导致星云快速的塌陷。
Large collections of dust are corralled together where the mutual gravity of the cloud causes it to rapidly collapse.
那么现在它们之间的，引力作用比每种，纯液体情况下的要强。
So now there's stronger attraction between them than there is between molecules in either of the pure liquid cases.
在强大的引力作用下，蓝色伴星上的物质正在被拉入黑洞。
Material from the large blue companion star is seen being pulled toward the black hole by its powerful gravity.
这些引力作用对太阳系行星轨道的演变具有微妙而又明显重要的影响。
These gravitational effects have a subtle, but apparently significant influence on the evolution of planetary orbits in the solar system.
当它们太高的时候，就会在中子星的引力作用下下坠，重新陷入地面。
When they are too high they sag under the stars' gravity and sink back into the ground.
类比质心和引力作用中心，引入感应电荷中心和静电引力作用中心概念。
The concept about the center of inductive electric charge and the center of electrostatic force are introduced by analogy with the center of mass and the center of gravitation.
暗物质不发光，它之所以能被发现，只是因为它对可见物质产生引力作用。
Dark matter gives out no light and is detectable only because of its gravitational effect on visible matter.
其宽广的旋臂被该星系团另一成员，巨型椭圆星系ngc 4697的引力作用所扭曲。
Its broad arms are distorted by gravitational interaction with a fellow Virgo cluster member, giant elliptical galaxy NGC 4697.
抓持附在肿瘤上的肾周脂肪，在对抗牵引力作用下将肿瘤从肿瘤床上提起。
The preserved perirenal fat attached to the tumour is grasped and placed on counter-traction to elevate the tumour away from the tumour bed.
根据1915年爱因斯坦发表的《广义相对论》,空间似乎是一个引力作用的曲线维度。
Einstein theory of general relativity 1915, space, its seems, is gravitationally curved.
最好的说明是：木星尽管已有几十亿年的历史，但由于引力作用，它仍在收缩。
The best suggestion is that Jupiter is still contracting gravitationally despite its age of several billion years.
天文学家从它们对正常物质(包括恒星、气体、尘埃等)的引力作用推论它们的存在。
Astronomers have deduced the existence of dark matter by observing its gravitational influence on normal matter, consisting of stars, gas, and dust.
天文学家们推测暗物质为宇宙提供了“脚手架”，通过引力作用形成一个使星系得以孕育的构架。
Astronomers suggest that dark matter provides vital "scaffolding" for the Universe, forming a framework for the formation of galaxies through gravitational attraction.
它只是星际空间的一块岩体，受火星引力作用而被吸引住，并沿着轨道环绕火星运动。
It is a space rock captured and now held in orbit by the gravity force of Mars.
“菲莱”以每秒80厘米的速度被推离开罗塞塔，在彗星很小的引力作用下漂向彗星。
Philae was nudged gently away from Rosetta at a speed of about 80 centimetres a second, and left to drift towards the comet under the influence of that object's feeble gravity.
天文学家推断，M51的旋涡状结构可能由它与邻近小型星系的相互引力作用而形成。
Astronomers speculate that M51's spiral structure is primarily due to its gravitational interaction with a neighboring smaller galaxy.
他在研究彗差星系簇的时候，发现星系本身的引力作用太小而不足以维持星系簇的成型。
While studying the Coma galaxy cluster, he found that the galaxies' gravity alone was much too small to hold the cluster together.
这种拖引力作用在这样一颗星球上，气候将如何演变以及演变将如何发生，会带来很多有趣的事情。
It will do lots of interesting things as far as how climates might evolve and how evolution might happen on such a planet.
根据新的规则，一颗行星是指该星体围绕太阳运行，并且足够大以至于在自身的引力作用下呈圆形。
According to the new definition, a full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity.
银河系漩涡展开过程中某些区域的星群之气体尘埃在引力作用下，形成由岩石物质和气体包围的小行星。
A region of gas and dust from exploding stars in the Milky Way galaxy starts to collapse under its own gravity, forming a small star surrounded by a disk of rocky material and gas.
这一行星寻找领域内的常见手段叫做径向速度法，需要极度精确的数据测量才能检测到行星对附近恒星的引力作用。
This common method in the planet-hunting world, called radial velocity, requires extremely precise measurements to detect a planet's gravitational pull on a nearby star.
从学术上来说，更早之前，基于这颗巨大的冰球对邻近的天王星的引力作用，人们就已经精确地预测到海王星的存在。
Technically, Neptune's existence was mathematically predicted years earlier, based on the gravitational effect the ice giant planet was having on neighboring Uranus.
从学术上来说，更早之前，基于这颗巨大的冰球对邻近的天王星的引力作用，人们就已经精确地预测到海王星的存在。
Technically, Neptune's existence was mathematically predicted years earlier, based on the gravitational effect the ice giant planet was having on neighboring Uranus.
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