Aarvark- About Galaxies
Aardvark is a social search service that connects users live with people who are able to answer their questions. Users submit questions via the Aardvark website, email or instant messenger, and it identifies and facilitates a live chat or email conversation experts in the particular fields. Users can also review question and answer history and other settings on the Aardvark website. On February 2010 Aardvark was acquired by Google.
I have been using this wonderful Social network, and I could find answers to some ‘ungooglable’ questions which I have been bearing in my mind for years.
I am posting some of those questions and answers here as a sample.
Q. how is it possible to move galaxies faster than light?
A. http://www.universetoday.com/2008/04/22/how-can-galaxies-recede-faster-than-the-speed-of-light/
Q. Due to the expansion of the universe, galaxies far away from us are receding at a speed faster than light. So every photon coming from such galaxies fail to reach our telescopes. Even gravitational effect also travels at the speed of light. Then how do we say such galaxies exist? Or how do we detect such galaxies?
A. As you look at galaxies further and further away, they appear to be moving faster and faster away from us. And it is possible that they could eventually appear to be moving away from us faster than the speed of light. At that point, light leaving the distant galaxy would never reach us.
When that happens, the distant galaxy would just fade away as the last of the photons reached Earth, and then we would never know it was ever there.
we are from one of galaxies and we are also moving away.
do the relative speed between the different galaxies increases?like the ones which are at the edge of the universe.
do you believe that there might be tons of other universes just like ours ?and our universe is disintegrating into tiny particles till the energy becomes constant throughout? and after there would be again several big bangs !!!!
Relative speed between galaxies do increase as the universe expands. concept of many universe is a postulate of quantum mechanics which is not yet proved or solved all of its mysteries. Can you tell me more about the part ‘ disintegrating into tiny particles..’ ?
Even i m not sure about it ! the singularity theorem which is applied in black holes and which is thought to be the early cause of big-bang can give us clues about it.
suppose if we send a man in the black hole,first he would get stretched and then disintegrated into tiny matter ! the space-time also collapse there after crossing the event horizon!
btw i really dont believe in Big bang theory ! do you?
i think we are ignoring the empty space which is considered to be filled with dark matter/energy !