I just don't get why the universe is expanding......do you know why?

Question

Hiya, OK so I have been reading that planets travel (orbit) faster as a result of 96% dark matter/energy, however I don't understand why this makes the universe expand and not contract. Do you know why?

Also, which direction is it expanding in? every direction or just one?

thanks.

Answer 1

Edwin Hubble demonstrated that all galaxies and distant astronomical objects were moving away from us ("Hubbles law"). Using the red shift of their electromagnetic spectra to determine the distance and speed of remote objects in space, he showed that all objects are moving away from us, and that their speed is proportional to their distance, a feature of metric expansion. Further studies since that time show that this expansion is extremely isotropic and homogenous, that is, it does not seem to have a special point as a "center", but appears universal and independent of any fixed central point.
Additional evidence came with the discovery of the cosmic microwave background radiation, which matched exactly the expected radiation from certain theories about the Big Bang at the time. This too can be seen red shifted, and the dynamics associated with metric expansion are observed to exist in the CMB spectrum such as (for example) the temperature of the CMB measured at earlier epochs.

Taken together, these are considered to confirm that space expands through a change in metric, rather than by objects flying apart in a fixed-metric universe. In addition there are other forms of evidence considered to be very strongly supportive of the current types of theory:

Answer 2

The future of our planet depends on the development of the Sun. When this star is going to consume all its reserves of hydrogen and helium, it will transform into a giant red star, and then its dimensions will significantly grow. The nearest planets like Mercury and Venus will be swallowed in the interior of the huge mass of the Sun, and the temperature of our planet will be so high, that every form of life that is on it, will simply disappear.The Earth's surface will transform into a desert, the oceans will be no more, and our planet's surface will look like the surface of the planet Mars. The Sun still has 5 000 million years, so we don't have to worry about ourselves yet.

Answer 3

If the equilibrim of the universe is kept because of rotation ,than it would make sense logically to conclude that the orbit radiii of masses increase as their mass structure increase .The reverse would be true if the mass structure were to decrease.
Therefore that would be the reason why the Universe appears to expend.The Universe direction is stretched out like a tent.Hence radially.

Answer 4

i think of it extremely is a query for which we basically have not got logical solutions. For me, it extremely is captivating for that reason, to think of that there is a extensive unanswered question underlying all of existence. At some instances in my existence i've got felt that mysteries like this are "holy," no count if or no longer you interpret that be conscious in a traditionally non secular vogue. The atheist author Kurt Vonnegut Jr., in "Sires of Titan," spins a lengthy cockamamie plot with regard to the evolution of human civilization in the worldwide wherein evidently eons in the past, a robotic area tourist grow to be dispatched from a civilization at one end of the galaxy to a distinctive end. via twist of fate, the robotic's area deliver breaks down basically as he reaches Titan, a satellite tv for pc of the planet Saturn. From his perch on Titan, he sends returned to his homestead planet a request for help. The message takes a lengthy time to reach, nonetheless. in fact evidently each and every of the main activities of human historic previous from the upward push of historical Egypt to the commencing up of the yank area software then are engineered via the distant alien civilization of Trafalmadore for the unmarried objective of informing the robotic that help is on the way, after which getting him a needed spare section. on the top of the e book, the Trafalmadorans finally be powerful. The spare section in question is finally further to the robotic messenger, who can proceed on his voyage. between the human beings then recent on Titan, whose existence has been cruelly grew to become interior out via this cosmic plot, goads the robotic, thoroughly against his training, to open the message pill he's meant to offer to an unknown civilization on the some distance fringe of the galaxy. And the robotic complies. What the message says is: "Greetings." To me, it extremely is hilariously humorous, and likewise extraordinary. i'm no longer orthodox adequate to settle for any unmarried non secular clarification for why the universe or the photograph voltaic equipment ought to exist. yet what Vonnegut's metaphor tells me is that the finished issue is incomprehensible -- absurd -- yet additionally fairly complicated, and beautifully desirable in its very own way. So echoing Vonnegut, I recommend the universe ought to have been created just to place across the message, "Greetings."

Answer 5

The Big Bang theory may help

Few million years ago there was a blast.
which caused all the matter in the universe.
thus it can be presumed that since there is no
friction for movement in space.
the stellar bodies are still moving away from each other.

Answer 6

The universe is particle energy.
All particle energy follows the same
pattern.
It explodes from a center point.
It expands.
It collapses back to the center point.

Answer 7

The sun will get bigger in the future, swallowing the planets (including earth) and it will continue to grow. After a while it will cool and it will turn to a dead star

Answer 8

No I don't know how. But it's expanding in all directions.

Answer 9

a few billion yrs back everything was concentrated in a small area called primeval atom. after sometime it xploded & everything got scattered in all directions. some of them congegrated and formed galaxies. they are still scattering and their speed increases as they move apart.

Answer 10

I donot think that it is expanding in its totality. In case it expands on one end it must shrink on the other end.