Radiometric dating wiki answers


11-Oct-2020 09:16

This captures the termination of the glaciation that preceded the Eemian interglacial and the inception of the last great glaciation that succeeded the Eemian.At the termination, CO2 follows d T exactly, but at the inception CO2 does not follow temperature down for 14,218 years.If you’re standing on the sidewalk somewhere you can talk meaningfully about the “observable Earth” (everything you can see around you), but it’s important to keep in mind that there’s very little you can say about the size and nature of the Earth from one tiny corner of it.The second statement also implies that there’s time and space independent of the universe.The first statement is the Big Bang, but we can use it to infer some interesting things about what was happening within the first second (which is the next best thing to actually being able to see the first second).That light is now the Microwave Background Radiation. First, when someone says that all of the matter and energy in the universe was in a region smaller than the head of a pin, what they’re actually talking about is the universe, which is just all of the galaxies and whatnot that we can see.Phrases like “suddenly exploded out of a point” makes it sound like you could have been floating around, biding your time playing solitaire and checking email in a vast void, and then Boom! ”) a whole lot of stuff suddenly appears nearby and expands.

That old light will still be everywhere, shooting in every direction.The expansion of the universe is independent of that. As time marches forward you (blue dot) will continue to hear the sound, but the sound you’re hearing is older and from farther away (red line). As the universe expands (as the rubber sheet is stretched) everything cools off, and the universe becomes clear, as everything is given a chance to move apart.Imagine standing in a huge (infinite) crowd of people. ” (or something equally pithy) all at once, you wouldn’t hear it all at once, you’d hear it forever, from progressively farther and farther away. That same light is still around, it’s still everywhere, and it’s still shooting in every direction.Certainly, there’s a little less because it’s constantly running into things, but the universe is, to a reasonable approximation, empty. The expansion of the universe does have some important effects, of course.

The light that we see today as the cosmic microwave background started out as gamma rays, being radiated from the omnipresent, ultra-hot gases of the young universe, but they got stretch out, along with the space they’ve been moving through. The background energy is now so low that you can be exposed to the sky without being killed instantly. Even more exciting, the expansion means that the sources of the light we see today are now farther away than they were when the light was emitted.So far, all indications are that the universe is flat, so it’s either infinite or so big that the curvature can’t be detected by our equipment (kinda like how the curvature of the Earth can’t be detected by just looking around, because the Earth is so big). However, in the open case it’s a touch more difficult to picture how the Big Bang worked.



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