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So sorry! I have no explanations for it. While I concede there may be global warming/cooling, ( I just love the new fudge envirowhackos use now, "climate change") I don't think mankind is able to influence it much, one way or the other.

I am still waiting for an answer to a question I posed in astronomy class 30 years ago. According to Hubble's law the universe is expanding. say I am standing on a world in which two other worlds/stars, whatever, are expanding away from me at 100,000 miles per second in opposite directions, due to speed of light limitations they would never see each other. However the real kicker is that, they in some way are moving faster than the speed of light. It matters not that I am standing in the middle, because, perhaps one of the worlds is not moving at all.

I love discussing these things with experts in the field.

I told them dark matter were galaxies that had gone past the speed of light (the big bang theory, Einstein,etc. all support this). That we can't see them because of this.

I did not receive any proof I was wrong, which I expected, as they would have to be able to measure it's red shift to give it's speed, and .... you can see the problem with that approach.

I can't prove I am correct, they can't prove I am wrong.

Who knows, for sure? Not me.

If every thing, galaxy, whatever, is moving away from every other object, (as the big bang, expansion theory speculates), then how come galaxies are crashing together?