Dark energy is not directly observed , but rather inferred from observations of gravitational interactions between astronomical objects , along with dark matter .
暗能量是不能被直接观察到的,只能在观察天体之间引力的相互作用时,连同暗物质在一起被推断出来。
Indeed , the researchers hypothesise these objects were formed in a planetary disc , like the planets in our own solar system , before gravitational forces ejected them from these systems .
Their precision allows for measurement of the effects of relativity-like time dilation and gravitational shifts-even across distances as small as tens of meters .
这样的精确性甚至可以在几十米之短的距离中测量相对论效应,比如时间流逝变缓与引力的变化。
Most of the planets are then weeded out by collisions and ejections , caused by gravitational interaction between adjacent planetary bodies .
相邻行星星体之间的引力的相互作用,致使大部分的行星随后都在碰撞和“驱逐”中消失了。
A consequence of einstein 's general theory of relativity-one of the pillars of modern physics-says that black holes formed by collapsing objects such as stars are so dense that nothing , not even light , can escape their gravitational pull .
The putative device-called the laser interferometer space antenna , or lisa-would not merely detect gravitational waves ; it could identify their sources precisely , in the same way that an optical telescope identifies pricks of light as stars .
One approach attempts to pin down the exact electromagnetic force needed to balance the gravitational tug on an object .
一种方法试图确定用于平衡物体所受引力的电磁力的精确值。
It showed that waves at different heights oscillate at different frequencies due to gravitational time stretching .
它表示了不同高度上的波由于重力的时间延伸而以不同的频率来振动。
A neutron star is under a constant pressure battle : massive gravitational pressure squeezing the neutrons together , but a countering neutron degeneracy pressure pushing out .
一颗中子星处于一场持续的压力对抗中:物质引力的压力不断挤压中子,但反向的中子简并压把它们相互推开。
Gravitational perturbations from the clumps , in turn , can push the nascent planets into orbits closer to the parent star .