A blueshift in the galaxy's spectrum - that is, the frequency of the light, as observed by us, is greater than when it was emitted.
Yes. Andromeida galaxy.
Sorry, Andromeda and earth are moving away from each other, not towards each other.
Look at the spectrum of lite from a galaxy if there is a red shift the galaxy is moving away from us or a blue shift the galaxy is coming toward us most have a red shift due to expansion of the universe we are all flying away from another
A blueshift in the galaxy's spectrum - that is, the frequency of the light, as observed by us, is greater than when it was emitted.
The Black Eye Galaxy [See Link] has a redshift of 0.001361, so it is moving away from us. Currently at 24 million light years from Earth
They move because they are both gravitationally bound. The Sun is bound to the Milky Way Galaxy and the Earth is bound to the Sun. Another way to put it is that they revolve around each others common center of gravity. What this mean is that, in the case of the Earth, it is falling toward the Sun's center of gravity but for every foot the Earth moves toward the Sun's center, the Sun moves a foot out of the way. The Sun is moving because it is falling toward the center of our galaxy. Again, it would make it to the center of our galaxy but for one reason. Our galaxy is moving toward the center of the Virgo Super Cluster.
If a galaxy's light is blue-shifted, it indicates that the galaxy is moving toward us. This shift occurs because the wavelengths of light are compressed as the source approaches, resulting in a shift toward the blue end of the spectrum. This phenomenon is a key piece of evidence for the motion of celestial objects and can help astronomers determine their velocities relative to Earth.
The Andromeda galaxy is moving towards us (The Milky Way Galaxy) at about 432,000 kph. It's expected to start merging in around 3 -> 4 billion years time.
incorrect. The farther away from earth a galaxy is, the faster it is moving.
I would think that current evidence suggests that the stars moving away from earth, some of them in far distant galaxies moving at unimaginably high speeds, are going much faster than stars moving toward us. The entire Andromeda galaxy is moving toward us and will collide with us in roughly 5 billion years, and it is not moving anywhere near as fast as the distant retreating galaxies.
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
When scientists observe a galaxy whose light is shifted toward shorter wavelengths, known as a blue shift, they can conclude that the galaxy is moving toward Earth. This phenomenon indicates that the galaxy's velocity is directed towards our planet, suggesting gravitational interaction or orbital motion within a larger cosmic structure. Additionally, blue shifts can provide insights into the galaxy's dynamics and distance relative to us.