Women were gravitating towards him from all directions like a planetary orbit.(Zoe on meeting Justus)

Your dreams come crushing down when you tow the wrong path by looking at what others are doing. The Milky Way Galaxy would have been crushed down by now if each planet had left its own orbit to revolve elsewhere!

One of the most striking results of modern investigation has been the way in which several different and quite independent lines of evidence indicate that a very great event occurred about two thousand million years ago. The radio-active evidence for the age of meteorites; and the estimated time for the tidal evolution of the Moon's orbit (though this is much rougher), all agree in their testimony, and, what is far more important, the red-shift in the nebulae indicates that this date is fundamental, not merely in the history of our system, but in that of the material universe as a whole.

i will forever be collidingwith a billion unnamedundiscovered stars, each of uson our own orbital paths.

This success permits us to hope that after thirty or forty years of observation on the new Planet [Neptune], we may employ it, in its turn, for the discovery of the one following it in its order of distances from the Sun. Thus, at least, we should unhappily soon fall among bodies invisible by reason of their immense distance, but whose orbits might yet be traced in a succession of ages, with the greatest exactness, by the theory of Secular Inequal

Her ghost is still orbiting Earth inside the tiny dim lit room. Orbiting endlessly like an invisible moon circling our beautiful blue planet.

There are stars in the night sky that look brighter than the others, and when you look at them through a telescope you realize you are looking at twins. The two stars rotate around each other, sometimes taking nearly a hundred years to do it. They create so much gravitational pull there's no room around for anything else. You might see a blue star, for example, and realize only later that it has a white dwarf as a companion - that first one shines so bright, by the time you notice the second one, it's too late.

The orbit of every planet is an ellipse with the sun at one of the two foci.

The velocities and forces involved in anything at orbital altitudes were enough to kill a human with just the rounding error. At their speeds, the friction from air too thin to breathe would set them on fire.

Given their current circumstances, things would have to be very bad indeed for Tilly to think the situation had gotten worse. Sure, they were all trapped in orbit around an alien space station that periodically changed the rules of physics and had killed a bunch of them, but now they’d decided to start shooting each other too.Yes, very bad.