What is time zero in Big Bang Theory?

The Big Bang at time zero is the most important of all boundary conditions for the very possibility of life in the Universe. In the Big Bang singularity, space and time do not exist, so causality cannot be operative. This leads us to conclude that the Big Bang was an uncaused event.

What is the correct sequence of the stages of the Big Bang theory?

The temperature of the fireball drives the resulting mix of particles and radiation, and we can divide the Universe evolution into four stages; heavy particle era; light particle era; a radiation era and the present day era of matter.

What are the 3 epochs in matter Era?

Matter Era. There is a transition to the Matter Era since there is a presence and predominance of matter in the universe. It consist of three major epochs – Atomic, Galactic and Stellar which span for billions of years. Including present day.

What happens on December 31 according to the cosmic calendar?

At about 8 AM on December 31, the first apes arise, splitting off from the remaining Old World monkeys at this time. The apes — defined by the complete lack of a tail of any type — would go on to give rise to many of the close relatives of humans that survive today: both the lesser apes and the great apes.

What do the last 14 seconds on the cosmic calendar represent?

Our universe was born 13.8 billion years ago. If we condense that time down to one calendar year, we create what is called the “cosmic calendar.” Life starts about that time too. In this scale, humans didn’t arise until the last day of the year, and modern civilization makes up about the last 14 seconds of the year.

What is anti matter and how it is different from dark matter?

Dark matter passes through us every second without significant effect. Antimatter annihilates matter, producing intense gamma photons. A large amount of antimatter would annihilate with an equal amount of matter causing a sizable explosion. Anti-electrons, also called positrons, are a form of antimatter.

What happened to the mass of the universe after the Big Bang?

Between 10 seconds and 377,000 years after the Big Bang. After most leptons and anti-leptons are annihilated at the end of the lepton epoch, most of the mass-energy in the universe is left in the form of photons. (Much of the rest of its mass-energy is in the form of neutrinos and other relativistic particles).

What happened to recombination after the Big Bang?

About 370,000 years after the Big Bang, two connected events occurred: the ending of recombination and photon decoupling. Recombination describes the ionized particles combining to form the first neutral atoms, and decoupling refers to the photons released (“decoupled”) as the newly formed atoms settle into more stable energy states.

Does $\\begingroup$ mean the object is moving outward?

$\\begingroup$Not exactly. An outward means that if you move a little bit in the direction of the vector, you will leave the object. It doesn’t mean that the entire object is in the other direction (as it is in this case).

What are the different epochs in early universe?

The early universe. 1 Electroweak epoch and early thermalization. Starting anywhere between 10−22 and 10−15 seconds after the Big Bang, until 10−12 seconds after the Big 2 The quark epoch. 3 Hadron epoch. 4 Neutrino decoupling and cosmic neutrino background (CνB) 5 Possible formation of primordial black holes.