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Cosmics
Evidence for the Big Bang Theory from the Cosmic Microwave Background (CMB) The cosmic microwave background (CMB) radiation provides several key pieces of evidence that strongly support the Big Bang theory of cosmology: Thermal Blackbody Spectrum The CMB has a near-perfect blackbody spectrum, with aRead more
Evidence for the Big Bang Theory from the Cosmic Microwave Background (CMB)
The cosmic microwave background (CMB) radiation provides several key pieces of evidence that strongly support the Big Bang theory of cosmology: Thermal Blackbody Spectrum
The CMB has a near-perfect blackbody spectrum, with a temperature of approximately 2.7 Kelvin. This is exactly what would be expected from the remnant radiation left over from the extremely hot and dense early stages of the Big Bang. Isotropy and Homogeneity
The CMB is remarkably uniform and isotropic across the entire sky, with only tiny temperature fluctuations of about one part in 100,000. This is consistent with the cosmological principle, which states that the universe is homogeneous and isotropic on large scales – a key prediction of the Big Bang model. Cosmic Microwave Background Anisotropies
Small temperature fluctuations in the CMB, known as anisotropies, reflect the tiny density variations in the early universe that later grew into the large-scale structures we observe today, such as galaxies and galaxy clusters. The pattern of these anisotropies provides a snapshot of the universe when it was only 380,000 years old. Acoustic Peaks in the Power Spectrum
The angular power spectrum of the CMB anisotropies exhibits a series of acoustic peaks, which correspond to the imprint of sound waves that propagated through the early universe before recombination. The positions and heights of these peaks provide precise measurements of cosmological parameters like the curvature of space, the density of ordinary and dark matter, and the nature of dark energy. Polarization
The CMB is also polarized, with a pattern that matches the predictions of the Big Bang model and provides additional evidence for the theory. The polarization is generated by Thomson scattering of the CMB photons off free electrons in the early universe. In summary, the CMB’s thermal blackbody spectrum, its remarkable isotropy and homogeneity, the pattern of anisotropies, the acoustic peaks in the power spectrum, and the observed polarization all provide overwhelming evidence in support of the Big Bang theory and the standard cosmological model. The CMB is considered one of the most important pieces of observational evidence for the Big Bang.
See lessSpace
Dark matter is a hypothetical form of matter that is believed to account for approximately 27% of the universe's mass and energy. It is invisible, intangible, and does not emit, absorb, or reflect light, making it undetectable by conventional means. Dark matter is thought to be a type of matter thatRead more
Dark matter is a hypothetical form of matter that is believed to account for approximately 27% of the universe’s mass and energy. It is invisible, intangible, and does not emit, absorb, or reflect light, making it undetectable by conventional means. Dark matter is thought to be a type of matter that does not interact with electromagnetic radiation, such as light, and is only detectable through its gravitational effects on visible matter.Properties of Dark Matter
Evidence for Dark Matter
Theories and Models
Current Research and Challenges
Dark matter remains one of the most significant unsolved problems in modern physics, and its discovery and understanding could significantly advance our knowledge of the universe and its fundamental constituents.
Development
Favourite Aspects: Problem-Solving: Many developers enjoy the logical and analytical nature of backend development. It involves solving complex problems and optimizing processes. Performance Optimization: There's a lot of satisfaction in making systems run faster and more efficiently. Tuning databasRead more
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