Because the origin was a explotion. therefore trusting evrything outward and the vacume of space cant slow it down.
There was NOT an explosion of matter into the "vacuum of space" at the start of our Universe. Rather, it was an expansion of space itself, taking matter "along for the ride." There is NO PLACE in our Universe from which matter exploding; rather, all points in space are expanding away from all other points.
The concept of co-moving helps us understand how galaxies move together in the expanding universe. By considering galaxies that move together as a group, we can study their interactions and behaviors more effectively. This concept is important for analyzing the dynamics and evolution of galaxies in the vast universe.
Hubble discovered other galaxies than our own. His work lead to the idea that these galaxies are generally moving away from our own Milky Way. Further, logical thinkers considered that the universe itself is expanding. And if the universe is expanding, it must at some point have been "compressed" with all the matter closer together. This is the source of the idea we call the Big Bang.
When water molecules are moving closer together in the air, it is called condensation. This process occurs when the water vapor in the air loses heat, causing the molecules to slow down and come together to form liquid water droplets.
Condensation.!.!.!
Condensation.!.!.!
Nearby galaxies won't show much of a redshift, because they aren't moving away very quickly - or at all. For example, the Andromeda Galaxy, M31, is actually getting closer - and will collide with the Milky Way in about 3 billion years.
galaxies are movign further away from eachother
It shows how galaxies are moving in relation to Earth.
Nearly all galaxies are moving away from our galaxie and planet.
Most galaxies are moving away from us. Only a few galaxies, which are nearby, are moving towards us.
they move by not moving.
compacted