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PHOTONS EXCEED BARYONS. “The present day photon number density is nγ,0 = 4.1×10(8) m(-3), which is roughly nine orders of magnitude greater than the present day baryon number density; the fact that there is a huge number of photons for every baryon has consequences for the thermal history of the Universe.” https://lnkd.in/e6ifiQMn View in LinkedIn

EARLY UNIVERSE. “For significant periods of time the density of the Universe is dominated by a single component. Therefore it’s instructive to initially consider the evolution of simple, single component, flat universes.” https://lnkd.in/e6ifiQMn View in LinkedIn

TWO TYPES. “Finally, we conclude by looking at what astrophysical and cosmological observations can tell us about the nature of dark matter, focusing on two particular cases: warm and self-interacting dark matter.” https://lnkd.in/e6ifiQMn View in LinkedIn

DISTRIBUTION. “To detect dark matter we need to know how it’s distributed, in particular in the Milky Way, so next we overview relevant results from numerical simulations and observations.” https://lnkd.in/e6ifiQMn View in LinkedIn

TUTORIAL. “We look at what observations can tell us about the nature of DM, focusing on warm and self-interacting DM.” (DM = dark matter). https://lnkd.in/e6ifiQMn View in LinkedIn

Distant stars captured by Hubble could so easily be the internal anatomy of a greater creature. https://lnkd.in/eWq3Y_st View in LinkedIn

THE WORLD AS WE DO NOT KNOW IT. “Some in quantum physics have have stated that information absolutely travels from future to past as well as from past to future.” https://lnkd.in/ezYv-wzR View in LinkedIn

THE BEAST. “We move on to the observational evidence for cold, non-baryonic dark matter, on scales ranging from individual galaxies to the Universe as a whole. Understanding the distribution of DM, in particular within the Milky Way, is crucial for its detection.” (DM = dark matter). https://lnkd.in/e6ifiQMn View in LinkedIn

Stunning Hubble shot. https://lnkd.in/eWq3Y_st View in LinkedIn

A LITTLE LATER. “The Universe becomes neutral and photons stop scattering and subsequently free-stream through the Universe. This process is known as decoupling and occurs at t ∼ 0.37Myr. The resulting Cosmic Microwave Background has a black body spectrum with present day temperature.” https://lnkd.in/e6ifiQMn View in LinkedIn