if as theorists state all matter from the big-bang is moving outwards, how can comets travel against the flow?

Question

i.e. all cosmic mass should be moving at the same speed away from the source of the big-bang, but comets move contrary to space time flow, explain it to me please

Answer 1

in a nutshell, the comet would be moving inside a galaxy that is moving outwards from the big bang - or towards the great attractor. This is comparable to a lorry going down a motorway in one direction and the immigrants inside moving around in differant directions

Answer 2

No one ever claimed all mass would be moving outwards at the same speed. Indeed, quantum physics makes this almost impossible.

As a matter of fact, comets, as well as planets, are moving outwards from the center of the Universe no matter where they are in their orbits. It's just that when they're in the part of their orbit that points towards the center of the Universe, they're not going quite as fast as when they're at the other side of their orbits. Orbits can be considered a closed system, sort of like how when you're riding in an airplane you can walk around in circles relative to the airplane even though the airplane is constantly moving forwards very fast.

Answer 3

In actuality, the theory that all the universe is growing, expanding, and moving outward from the point of the 'Big Bang' is talking about an average, or total movement.

The local effects of gravity, which is an application of the space-time field, can act upon a part of the system, in order for THAT part to act contrary to the whole.

For example, in a stream, all the water is flowing downhill, toward to ocean. Some of the water DOES flow cross-ways or even upstream due to turbulent flow. As an AVERAGE, the system of the river DOES flow in one direction, but any given piece in the system can flow upstream due to localized conditions.

Answer 4

When the Oort cloud was formed and the Comets began their interior movement towards the sun, it was through gravitational pull and not from the motion of the Big Bang that this pull originated. We are still moving (the Solar System) relative the Milky Way, and the Milky Way is still moving relative the local Galactic Cluster and the local Galactic Cluster is still moving away from the origin of the Big Bang. So, its just so huge that it seems nonesensical.

Answer 5

They are still moving outwards with the expansion of the universe. They just appear to be moving against it relative to earth so you might equally say that the earth is moving away from the cente of the big bang faster than the comet..

Answer 6

You mean the relative flow? The sun is moving away from the center of the universe. The comets and the planets are hanging out going around the sun. They are still zipping away from the center of the universe.

Imagine you are in a car moving away from New York. Further imagine that you are spinning a ball on a short string inside the car. Is the ball moving away from NY? Of course it is. Is the ball sometimes moving toward NY as it spins around inside the car? Possibly. That depends on how fast you are spinning it. The speed of the car moving away from NY may be higher or lower than the speed of the ball. If the car is slower than the ball, then sometimes the ball is headed toward NY and sometimes it is moving away from NY very quickly. What is the average velocity of the ball? On average, it is moving away from NY.

Answer 7

Comets and planets orbiting stars, stars orbiting the centers of galaxies and galaxies hovering around each other in their groups are simply more affected by gravity than the expansion of space. They are close enough to each other that gravity is the primary force moving them.

For similar reasons the atoms in your body manage to stick together via the weak and strong nuclear forces that work over smaller distances rather than all falling in towards the center of the Earth due to gravity.

Answer 8

On the local scale, gravity still dominates. The expansion of space dominates only over very large distances. Even within galaxy clusters, the gravitational attraction between galaxies is greater than their relative expansion.

To look at the numbers, the Hubble Constant is around 70 km/s / Mpsec. That means that the average galaxy at a distance of one million parsecs (3,260,000 light years) will is moving away from us at 70 km/s. Over billions of light years, this results in a large red shift. But over a distance of one light year, the expansion speed is only about 21 millimeters per second.

Answer 9

It´s the same thing that makes planets orbit,

gravitation.

comets have orbits too, huge ones, in the end, all planets, comets and stuff are indeed moving outwards because of the universe expansion, that means that everything with an orbit, is actually moving in a spiral path.

Answer 10

Comets don't go against the flow, they orbit the sun like any other object in the solar system. And while our solar system and galaxy aren't expanding the distance between galaxies is.