On Earth, molten or semi-molten magma is the source of many rocks. This lava is either directly taken from the planet's mantle, which is a mostly solid but slowly moving layer under the crust, or it is produced by re-melting even older fragments of pre-existing crust. Magma that was once liquid gradually solidifies into rock when it cools. Growing mineral grains can hold elements like uranium that decay over time and act as a kind of stopwatch, documenting their age, during the cooling process of magma crystallization. Additionally, crystals can hold onto other substances that, as a surname might, trace a person's family, and monitor the composition of their parental magma.
Researchers may then create a timeline of crust production using these two pieces of knowledge: age and composition. Afterward, we may decode its fundamental frequencies by applying the Fourier transform's mathematical prowess. Similar to decoding cake batter ingredients that have been blended, this technology essentially decodes the frequency of events. The findings support the notion that crust production on the early Earth had a roughly 200-million-year cycle. Our findings support the notion that crust production on the early Earth had a roughly 200-million-year cycle.
However, another procedure has a comparable rhythm. Although they are both rotating around the supermassive black hole at the concenter of the galaxy, the four spiral arms of the Milky Way and our solar system are traveling at different rates.
Our Solar System is surging into and out of the spiral arms of the galaxy because the spiral arms revolve at 210 km/s and the Sun is moving at 240 km/s. The spiral arms can be compared as dense regions that slow the movement of stars, similar to a traffic bottleneck that only dissipates further out (or through the arm). According to this hypothesis, our Solar System enters spite real arms of the galaxy once every 200 million years.
