Recent content by revnice

Bandeesnatch: Thank you! Until you posted that I've been feeling brow beaten and shouted down. I didn't understand but just knowing that someone is looking into it is enough. It means I'm not crazy or stupid.

Well gentlemen (and I use the word loosely) it appears that I'll never have the slightest clue on this question because the explanation in layman's terms is completely wrong. My math is limited to 2 + 2 can equal 5 if the value of two is large enough. Accept it from those who know? The last...

Ibix: >where's the energy coming from? Something that's already moving. My hypothetical blob of dust couldn't attract anything with enough speed to break it, but something, almost anything, already on the move, could. Who knows how many budding planets have been obliterated by Ouamuwamu (sp)...

Dale: My words are essentially the same only phrased as a question. Which is true, creating or stretching? The AI answer doesn't answer that for me because it's vague, could be either, could be both.

It could well be AI generated but I've heard celebrity physicists express expansion in precisely those terms. Namely, that the fabric of spacetime can ripple, stretch and vibrate. It's how we measured the merging of two neutron stars a few years ago with the gravitational wave detector. The AI...

Dave: "created" or "stretched" between me and the table? No, because your kitchen is not expanding, it's contained by the walls. If you had no walls and the kitchen expanded to double the size, you'd have double the space between everything.

[Mentor’s note: although this post violates the forum rule against using AI as a source - and indeed is a good example of why we have that rule - we are leaving this post up as it has attracted replies] This from Google: Yes, space is being created as the universe expands. However, this...

Dave: >That does not in-and-of-itself require anything to happen to the space between them. Can't say I agree with you there. If everything is moving away from everything else, there must necessarily be more space between everything. Dale: Not knowing doesn't mean the answer doesn't matter, it...

We've seen sugar granules clumping in a bag on the spacestation. We know stuff acretes and a small start can resilt in a massive planet. If plotted, the acretion curve would be exponential because a bigger body attracts more stuff. So, we start with a few particles of dust clinging together...

Dale: >Ok, so what is the difference? Beats me, but one thing seems pretty certain, when objects move away from each other, there's more distance and more space between them. Since we're not expanding into any kind of container or boundary, new space must be coming from somewhere or getting...

I've heard expansion explained both ways. New space coming into existence or existing space stretching, no new space added.

Do we even know? My understanding of dark energy is that particles come into existence, exert and outward force, then vanish. My problem with that is how, of course, then how does dark energy know to push everything in the same direction? The pressure exerted would be in all directions, even if...

Thanks to all! I'm not as good as I need to be to understand this. I'm aware of the terms you guys used but it's prettymuch a case of 'Here lie dragons.' Would it be fair to say that a graviton is implied because that would be consistent?

The current explanation of gravity is that it's the warping of spacetime by the prescence of a body. So why are we looking for a graviton? Thanks - rev