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Mainly because of the redshift we see for distant objects. On average this increases with distance; that is, the further something is from us, the faster it's moving away from us. This is consistent with the universe expanding.

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16y ago

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Related Questions

Is the universe infinate?

Scientists currently believe that no, the universe is not infinite. It is of a finite size however, this finite size is constantly expanding but not expanding AWAY from anything, just expanding


Is the universe imploding?

There is no evidence of that, in fact most scientists believe it is expanding.


Why do scientists believe the universe is still expanding?

Scientists believe the universe is still expanding primarily due to observations of distant galaxies, which are moving away from us, a phenomenon known as redshift. This observation supports the Big Bang theory, indicating that the universe has been expanding since its inception. Additionally, the discovery of dark energy, a mysterious force driving the acceleration of this expansion, further reinforces the idea that the universe continues to grow. Measurements of cosmic microwave background radiation also provide evidence of the universe's expanding nature over time.


Is universe getting bigger?

Yes. To be more exact, it is "space" within the "observed universe" that is expanding. A confusing fact is that many astronomers believe the universe as a whole may already be infinite in size. This doesn't stop them saying the observable universe is still expanding. "Infinity" is a tricky idea.


Do you believe that the universe is still expanding?

Yes, scientific evidence, such as redshift measurements of distant galaxies, indicates that the universe is still expanding. This expansion is believed to be accelerating due to dark energy, a mysterious force that counteracts gravity at large distances.


Who was the astronomer that discovered the universe was expanding?

Edwin HubbleAnswer2:Hubble did not believe the universe is expanding. The universe is not expanding like the big bang, it is excited like an atom. The electrons jump to a higher level and lower their speed. The lower speed is a lower energy state, the max energy is when v=c.Hubble;s relationship v=HD indicates the distance D from the max energy state, where v = c.Hubble's Constant is dR/Rdt =c/R =H = 300M/150TT = 2E-18 m/s x31E21 = 62km/s/Megaparsec.


How long is space and how wide?

no one is quite sure where the universe begins or ends but what they do know is that the universe is continuously expanding. they also believe that one day probably a trillion years from now that it will stop expanding and shrink and then we will have another big bang.


Where does the universe end or are you in a universe like a solar systemthat means are there more universes?

Some scientists believe that there is only one universe. The universe is constantly expanding, from the centre outwards. The very fabric of space is expanding, which means that there isn't necessarily a physical boundary where the universe ends. The details of the various ideas regarding the structure of the universe are numerous and varied - I simply cannot synthesize everything into a short, concise answer for this site. It's also a difficult concept to conceptualize. Some scientists believe in the existence of a multiverse. There are various hypotheses regarding how a multiverse works; such hypotheses include M-theory (or membrane theory), the Ultimate Ensemble, Hugh Everett's many-worlds interpretation (MWI), and chaotic inflation theory.


What will happen after this universe destroyed?

There is no reason to believe that the Universe will be "destroyed" - it will continue expanding, and at some point there won't be enough free energy left to support any type of life, but the Universe itself will continue existing.


What will happen after this universe is destroyed?

There is no reason to believe that the Universe will be "destroyed" - it will continue expanding, and at some point there won't be enough free energy left to support any type of life, but the Universe itself will continue existing.


What will happen after universe is destroyed?

There is no reason to believe that the Universe will be "destroyed" - it will continue expanding, and at some point there won't be enough free energy left to support any type of life, but the Universe itself will continue existing.


What is the world unfolding into and where is it expanding to according to the scientific community?

This sounds as though you mean the universe, not the world. We believe that the universe has been expanding since the big bang. As to what it's expanding into, that's something of a non-question according to astronomers. If you look around on the internet you can get detailed explanations, including one by Zogg from Betelgeuse on Youtube.