People who look at it see things moving around all the time.
Models and theories about the universe are always changing because new evidence and observations constantly challenge our understanding of the cosmos. Scientific knowledge is a dynamic process, and as technology and instrumentation improve, our understanding of the universe evolves. Additionally, new discoveries may require revisions or updates to existing models and theories.
The cosmic background radiation is an observation of the effects of the Big bang [See related question] it does not effect the Universe changing in anyway.
The universe is expanding, and it was recently discovered that the universe is expanding much faster than was originally thought. Also, objects within the universe are constantly changing, such as the birth and death of stars, expanding and/or contraction of gas clouds, and objects in motion (the spinning of galaxies and solar systems, rogue stars or planets) are constantly changing.
All the available evidence strongly indicates that the Universe is, indeed, expanding.
Currently, scientific evidence suggests that the universe is expanding rather than contracting.
It is not so much that the universe is expanding, but rather the rationalization for its expansion that provides evidence to support the Big Bang Theory. The Big Bang supports interpreted observational evidence of the Cosmic Microwave Background Radiation (CMBR) barrier that there is an evolutionary expansion of the universe which promotes a finite age for the universe.
the universe is always changing
because kepler was smart
The Evidence - 2001 God the Universe and Everything 1-15 was released on: USA: 13 January 2002
The Universe - 2007 Mars The New Evidence 5-2 was released on: USA: 5 August 2010
Scientist speculate there may be theoretically, but there is no evidence that there is any universe other than this one.
The best supporting evidence that the universe is expanding is that galaxies are receding from one another, indicating that the universe is expanding over time. This observation is based on the redshift of galaxies, known as Hubble's Law.