A red-shift caused by the Doppler-effect indicates that the object is rapidly moving away from the observer.
Note that at extreme distances, red-shift is not caused by the Doppler-effect, but primarily by the expansion of space between the object and the observer.
There is no specific "red shift theory"; redshift is an observational fact, meaning that light arrives with the energy levels shifted towards less energy, compared to the way it was emitted. This can be observed in the light's spectrum.
Redshift means that the light has somehow lost energy before it reached us; for example, through the Doppler effect, through the expansion of space, or because it was emitted from a "gravitational well".
This is usually attributed to the Doppler effect (there doesn't really seem to be any other reasonable explanation); in which case, the conclusion is that the Universe is expanding.
Speed an object is moving away from the observer.
The "Doppler Theory".
In the galaxy, we are in one of the spiral arms. We do not know where we are in the Universe.
Universe -> galaxy -> star -> planet
The size of a galaxy means how old the galaxy really is and also the stars indicate how old the galaxy is. So both the size nd the amount of stars indicate how old the galaxy is.
that the universe was in 1904 expanding. this was due to the lack of blue shift, therefor it can be deduced that the red shift in orrcuring within the galaxy.
Universe, galaxy,nebula,solar system, star, planet
If you look at a distant galaxy, the light from the galaxy has travelled for perhaps a hundred million years, a billion years, or up to an age close to the age of the Universe (13 billion years or so), depending on the galaxy's distance. Thus, the light you see shows you how the Universe was billions of years ago.
One important clue is the Doppler effect - the redshift of distant galaxies. It turns out that the greater the distance to a galaxy, the faster it moves away from us.One important clue is the Doppler effect - the redshift of distant galaxies. It turns out that the greater the distance to a galaxy, the faster it moves away from us.One important clue is the Doppler effect - the redshift of distant galaxies. It turns out that the greater the distance to a galaxy, the faster it moves away from us.One important clue is the Doppler effect - the redshift of distant galaxies. It turns out that the greater the distance to a galaxy, the faster it moves away from us.
1.the observed wavelength of the dark line from the distant galaxy has increased 2.therefore the distant galaxy must be moving away from the Earth suggesting the Universe is 3.expanding outwards from a small initial point
the universe is bigger than the galaxy because our galaxy (the milky way) is in the universe.
Actually a galaxy is in a universe
A galaxy is a tine part of the universe.
The furthest Hubble as ever gazed into the universe is the Hubble Ultra Deep Field. Search that in google and check it out.
The universe contains countless galaxies, think of the universe as a galaxy of galaxies.
The universe contains countless galaxies, think of the universe as a galaxy of galaxies.
Yes. If the photons have travelled 10 billion years, that means you are seeing the galaxy as it was 10 billion years ago.
galaxy is in the universe
a Galaxy is smaller because the universe holds everything