Galxe (@galxe) • Hey
The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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- The spatial region that can be observed with telescopes is called the observable universe, which depends on the location of the observer.
- For example, radio messages sent from Earth may never reach some regions of space, even if the universe were to exist forever: space may expand faster than light can traverse it.
- According to the general theory of relativity, far regions of space may never interact with ours even in the lifetime of the universe due to the finite speed of light and the ongoing expansion of space.
- These laws are Gauss's law and the non-divergence of the stress–energy–momentum pseudotensor.
- The universe also appears to have neither net momentum nor angular momentum, which absences follow from accepted physical laws if the universe is finite.
- since matter and antimatter, if equally produced at the Big Bang, would have completely annihilated each other and left only photons as a result of their interaction.
- This imbalance between matter and antimatter is partially responsible for the existence of all matter existing today,
- The universe appears to have much more matter than antimatter, an asymmetry possibly related to the CP violation.
- their effects are confined mainly to sub-atomic length scales.
- The remaining two interactions, the weak and strong nuclear forces, decline very rapidly with distance;
- Gravity's effects are cumulative; by contrast, the effects of positive and negative charges tend to cancel one another, making electromagnetism relatively insignificant on astronomical length scales.
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- Of the four fundamental interactions, gravitation is the dominant at astronomical length scales.
- In this era, the expansion of the universe is accelerating due to dark energy.
- After about 9.8 billion years, the universe had expanded sufficiently so that the density of matter was less than the density of dark energy, marking the beginning of the present dark-energy-dominated era.
- The universe also contains a mysterious energy—possibly a scalar field—called dark energy, the density of which does not change over time.
- and also for seeding the universe with elements heavier than helium, through stellar nucleosynthesis.
- They were responsible for the gradual reionization of the universe between about 200–500 million years and 1 billion years,
- These were probably very massive, luminous, non metallic and short-lived.
- After around 100–300 million years,the first stars formed, known as Population III stars.
- where the dark matter was most dense, and voids where it was least dense.
- Ordinary matter, attracted to these by gravity, formed large gas clouds and eventually, stars and galaxies,
- ^
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- In the earliest stages of the universe, tiny fluctuations within the universe's density led to concentrations of dark matter gradually forming.
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- This marked the end of the radiation-dominated era and the start of the matter-dominated era.
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- and began to dominate the large scale behavior of the universe.
- At around 47,000 years, the energy density of matter became larger than that of photons and neutrinos,
- When Lily met Poppy at @lens/ethglobal İstanbul
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- Today, we proudly introduce ourselves as Avara.
Avara is the home to some of the most innovative web3 brands: Aave, Lens Protocol, GHO, Sonar, and now Family, all building towards a people powered internet that benefits all.
We're thrilled to announce the acquisition of Family. With Family, led by Benji Taylor, we're reinforcing our commitment to making web3 accessible through world class product design.
Read the genesis post, penned by @lens/stani.
https://avara.xyz/blog/introducing-avara-and-announcing-acquisition-of-family
- As the universe expands, the energy density of electromagnetic radiation decreases more quickly than does that of matter because the energy of each photon decreases as it is cosmologically redshifted.
- they form the cosmic microwave background (CMB).
- The photons released ("decoupled") when these atoms formed can still be seen today;
- Unlike plasma, neutral atoms are transparent to many wavelengths of light, so for the first time the universe also became transparent.
- Which Lens creator do you think is or could be vegan? 🥑 🥦 🥬
I have always been interested in veganism, a way of life that demonstrates respect for nature and non-human beings most effectively. It seems that there are people in Lens Frens who are or could potentially be vegan.
Who do you think in the ecosystem is vegan or has the potential to be? Let's discuss this in the comments! **💚**
Btw, I think @mazemari.lens is not vegan but could be easily imo
- electrons and nuclei were combining for the first time.
- This is known as recombination for historical reasons;
- After about 377,000 years, the universe had cooled enough that electrons and nuclei could form the first stable atoms.
- the universe was still far too hot for matter to form neutral atoms, so it contained a hot, dense, foggy plasma of negatively charged electrons, neutral neutrinos and positive nuclei.
- After nucleosynthesis ended, the universe entered a period known as the photon epoch. During this period,
- The other 75% of the protons remained unaffected, as hydrogen nuclei.
- Any other element was only formed in very tiny quantities.
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- About 25% of the protons and all the neutrons in the universe, by mass, were converted to helium, with small amounts of deuterium (a form of hydrogen) and traces of lithium.
- so only the fastest and simplest reactions occurred.
- This process, known as Big Bang nucleosynthesis, lasted for about 17 minutes and ended about 20 minutes after the Big Bang,
- which then formed more complex atomic nuclei through nuclear fusion.