Friedmann equation
What is the equation for the universe?
The Friedmann equation which models the expanding universe has a parameter k called the curvature parameter which is indicative of the rate of expansion and whether or not that expansion rate is increasing or decreasing. It indicates the future fate of the universe.
What is the equation for the expansion rate of the universe?
Most recently, by comparing the apparent brightness of distant standard candles to the redshift of their host galaxies, the expansion rate of the universe has been measured to be H = 73.24 ± 1.74 (km/s)/Mpc.
What is Omega in cosmology?
ΩΛ (Omega Lambda) In a flat universe, ΩΛ is the fraction of the energy of the universe due to the cosmological constant, i.e., what we would intuitively call the fraction of the universe that is made up of dark energy.
What is the current density of the universe?
WMAP determined that the universe is flat, from which it follows that the mean energy density in the universe is equal to the critical density (within a 0.5% margin of error). This is equivalent to a mass density of 9.9 x 10–30 g/cm3, which is equivalent to only 5.9 protons per cubic meter.
What is the most beautiful equation?
Euler’s identity
What is the equation?
In algebra, an equation can be defined as a mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value. The most basic and common algebraic equations in math consist of one or more variables.
What is outside the universe?
Astronomers think space outside of the observable universe might be an infinite expanse of what we see in the cosmos around us, distributed pretty much the same as it is in the observable universe. After all, it doesn’t make sense that one section of the universe would be different than what we see around us.
Is space expanding faster than light?
The quick answer is yes, the Universe appears to be expanding faster than the speed of light. By which we mean that if we measure how quickly the most distant galaxies appear to be moving away from us, that recession velocity exceeds the speed of light.
What is the most important number in the universe?
One of the most important numbers in our universe is the number Pi or π. Explore humankind’s odyssey—attempts throughout the ages that truly transcend cultures—to compute, approximate, and understand this enigmatic number.
What is Omega matter?
Cosmologists usually give the density of matter in terms of the density necessary to just cause the universe to re-collapse (Omega Matter). The effect of a cosmological constant can be thought of as contributing to the value of Omega, that is: (Omega Total)=((Omega Matter)+(Omega Lambda)).
What is the meaning of dark matter?
Dark matter, a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. Dark matter makes up 30.1 percent of the matter-energy composition of the universe; the rest is dark energy (69.4 percent) and “ordinary” visible matter (0.5 percent).
What is Big Rip theory?
In physical cosmology, the Big Rip is a hypothetical cosmological model concerning the ultimate fate of the universe, in which the matter of the universe, from stars and galaxies to atoms and subatomic particles, and even spacetime itself, is progressively torn apart by the expansion of the universe at a certain time
What is a coasting universe?
The “coasting” universe is one that expands at a constant rate given by the Hubble constant throughout all of cosmic time. The accelerating universe on the right will continue to expand faster and faster forever. (
How many universe are there in total?
Linde and Vanchurin have applied some reasonable rules to calculate that the number of universes in the multiverse and have totted it up to at least 10^10^10^7. A “humungous” number is how they describe it, with no little understatement. How many of these could we actually see?