Category: Uncategorized

STAGE 4. STRUCTURE FORMATION. “Structures start forming at ∼ 0.1 Gyr, and then Λ, or dark energy, comes to dominate the Universe, causing its expansion to accelerate, at t ∼ 10 Gyr.” https://lnkd.in/e6ifiQMn View in LinkedIn

YORKSHIRE PUDDING. “When wheat flour began to come into common use for making cakes and puddings, cooks in northern England (Yorkshire) devised a means of making use of the fat that dropped into the dripping pan to cook a batter pudding while the meat roasted. In 1737, a recipe for "a dripping pudding" was published.” https://lnkd.in/ejcUhJym. View in LinkedIn

OFF THE RADAR. “While philosophers and religious scholars have explored awe for centuries, it was largely ignored by psychologists until the early 2000s.” https://lnkd.in/eTQYza-q View in LinkedIn

STAGE 3. RECOMBINATION AND DECOUPLING. “0.3Myr). Structures start forming at ∼ 0.1 Gyr, and then Λ, or dark energy, comes to dominate the Universe, causing its expansion to accelerate, at t ∼ 10 Gyr.” https://lnkd.in/e6ifiQMn View in LinkedIn

STAGE 2. RADIATION-MATTER EQUALITY. “The matter dominated era starts at t ∼ 0.05 Myr, with the formation of atoms and the ‘release’ of the CMB occurring shortly after (t ∼ 0.3Myr).” (CMB = cosmic microwave background). https://lnkd.in/e6ifiQMn View in LinkedIn

FLAT GEOMETRY. “The positions of the acoustic peaks in the CMB angular power spectrum (or equivalently the typical size of the hot/cold spots) are largely sensitive to the geometry of the Universe, and hence the total energy. i.e. the total energy density is very close to the critical density for which the geometry of the universe is flat.” (CMB = cosmic microwave background). https://lnkd.in/e6ifiQMn View in LinkedIn

INEQUALITIES. “In other words, non-baryonic DM is required for perturbations to grow sufficiently from the initial amplitude, as measured from the CMB anisotropies.”(DM = dark matter; CMB = cosmic microwave background). https://lnkd.in/e6ifiQMn View in LinkedIn

MONSTER CRATER. “The Bouguer gravity anomaly shows a large well-defined semi-circular concentric anomaly pattern with amplitudes up to 30 mGals with a 40 km diameter central high and two lows at about 70 km and 120 km diameters (Figure 2). Semi- circular concentric anomalies were inferred at 52.5±5km,77.1±6.3 km, 99.6±6 km and 139 ± 11 km radial distance, which define a multi-ring structure with central peak ring limited by ring 1.” https://lnkd.in/eqAYpQg2 View in LinkedIn

VISIBLE MATTER. “Baryons, however, are tightly coupled to photons until decoupling, at tdec ≈ 0.4 Myr and therefore perturbations in baryons can only grow after decoupling. Consequently in a universe without non-baryonic DM the initial density perturbations have to be larger, and produce larger temperature fluctuations in the CMB, ∆T/T ∼ 10(-4), for observed structures to form.” (DM = dark matter; CMB = cosmic microwave background). https://lnkd.in/e6ifiQMn View in LinkedIn

FRAGMENT FROM NATURE continues from last weekend and concludes tomorrow on the theme of the physiological reason for the extinction of the dinosaurs. Such an existential threat from a meteor strike on our planet is very real, as one glance at the pockmarked surface of the moon will confirm. The universe is violent and unpredictable, on scales beyond our ability to change, so hurry about your business without a care. View in LinkedIn