﻿ Is the universe expending or shrinking? - science mathematics
Is the universe expending or shrinking?

## Is the universe expending or shrinking?

[From: Astronomy & Space] [author: ] [Date: 04-11] [Hit: ]
Is the universe expending or shrinking?......

Is the universe expending or shrinking?

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Epic Guy say: There's a theory where after a few trillions (if im right) of years the universe will shrink because of how much it expanded, there's also another where space will be expanding forever (if im right) then the objects will start to fly away from each other until you see nothing but darkness
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goring say: If the physical Universe was created as a structured space and from that complex atomic structure as per general relativity field equation,the universe is a conservative system.
Hence it remains contained by it gravity boundary.
Galaxies change orbits at different latitudes of the Universe due to their mass loses in order to maintain gravitational equilibrium.
The containment of the Physical Universe is basically invariant
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Soliman say: the universe is expending.
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Ronald 7 say: It depends on where you are in it
Everything is Relative
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Raymond say: The Universe? We don't know.
SPACE is expanding. Everywhere. Including inside individual photons (this is the cause of cosmological redshift).
The distance between objects grows with time because of the expansion of space everywhere. Take two objects separated by a million parsecs (3.26 million light-years = roughly the extent of the Local Group). At one moment, the distance between the two objects is some precise value x = a million parsecs.
One second later, the distance is now x + 70 km, even though the two objects are are rest relative to their local space. There is simply more space (70 km worth) between them.

Depending on the configuration of space (and how many dimensions it really has), this expansion of space COULD cause the universe to expand (maybe in a direction that does not belong to the 3 dimensions we perceive)... or not. There are some geometrical configurations that could allow the universe to not expand, even if it is already full of expanding space.
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oldprof say: Hubble found that it is expanding. In fact as we reach older portions of the universe, we find that it's expanding at a faster rate than the newer parts. Which is to say, the expansion is accelerating. By measure of a red-shift in light, we have actually determined the rate at which the speed of the expansion is increasing. It's roughly 50 kps/3.26 million light years, which is called the Hubble Constant.

So, for example, at 32.6 million light years, the rate of expansion would be 500 kps. As you can see, at this rate, the speed of expansion would soon reach 300,000 kps which is the speed of light. And, yes, space itself can expand faster than light speed.
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say: depends on the temperature of the water in the pool
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rick29148 say: it's just a 'theory', but expanding .............
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tentofield say: It seems to be expanding.
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John P say: It is "expending" lots of cash at the moment. Check spelling before sending any text!
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βεи say: Actually the universe is expanding but rather than expanding we can call it space/universe is moving.The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. This means that no matter what galaxy you happen to be in, all the other galaxies are moving away from you.

However galaxies are not moving through space but they are moving inside space .

The universe encompasses everything in existence, from the smallest atom to the largest galaxy; since forming some 13.7 billion years ago in the Big Bang, it has been expanding and may be infinite in its scope. The part of the universe of which we have knowledge is called the observable universe, the region around Earth from which light has had time to reach us.
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james say: Well way back in the 60s all the books said it was shrinking. But today all the new books say it is expanding. So depends on the book you read about it.
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knack say: moving would be a better word but the current observation leads to expanding suggesting a center based explosion

our observation is like trying to see the forest from inside the trees
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Tom S say: Space is expanding.
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MysteryGuy say: Expanding because something maybe dark energy is repelling the effects of gravity.
But scientist believe eventually, all the energy between any two points would be equal. When thermodynamic equilibrium is established, gravity will overtake that expansion, slow it down and then the big crunch will start ie the shrinking.
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poldi2 say: Neither, the universe is expanding.
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quantumclaustrophobe say: Neither. It's expAnding.
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geezer say: The universe as a whole is expanding .. outwards from the centre in every direction .. and the expansion is increasing.
However, each individual solar system is being held in place by gravity.
So ..
Our solar system is moving further away from the others, but the distance between everything within our solar system remains constant.
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r.wolfpaw say: Both.
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drake say: It’s distracting
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Elyse Rose say: Yes.
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CarolOklaNola say: The Universe is expanding and the expansion is getting faster . The SPEED of the expansion is a topic if hot debate ON YA. The Hubble constant is NOT constant and it is NOT A SPEED or velocity. The Universe is NOT shrinking. It expanded a LOT faster in the past, BEFORE a vacuum existed.

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Hindusufi say: Expanding and the expansion is speeding up
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