I've read that Dark Energy was invented to explain why galaxies really far away are moving away from us faster than ones closer to us. Now I'm sure they did this, but did they take into account that if they look at 2 galaxies A and B. Galaxy A is 500 million ly away and B is 5billion ly away, so, galaxy B would also be 4.5 billion ly older than galaxy A and therefore receding from us at a faster rate since according to bing bang the galaxy was expanding faster 4.5 billion years ago than it was 500 mililon years ago? or do they take this into account and still find that the universe is accelerating? Also. is there a website I can go to to find the reletive speeds of galaxies that have been observed and measured and what not?