What happen before the big bang?

Question

how is earth created and what were the first ever lifeform that existed on earth?

Answer 1

big bang wast probably even what happend at the beggining  they just tell people this stuff to hush them up  read the bible talk to the lord you want know he will give you a answer dont look for it it will come to you

Answer 2

What happned before the big bang is unknown but M-Theory has some ideas that take the time before the singularity.

For the origin of the Universe is intriguing astronomers with the idea that a "Big Splat" preceded the Big Bang. It proposes that there may be an unseen parallel universe to ours. The idea, which is still at the development stage, may provide hints about what happened before our Universe exploded into existence some 13.7 billion years ago. The theory has been outlined in the past few days at the University of Cambridge in the UK and the Space Telescope Science Institute in the US. Paul Steinhardt and colleagues at Princeton University propose the so-called "ekpyrotic model". It explains important details about the nature of our Universe such as why the cosmos is expanding the way it is.

For the uninitiated, the ideas are difficult to grasp. At their heart is string theory, the idea that the fundamental building blocks of space and time are tiny vibrating strings. String theory has excited theorists in the past few years although it has remained very much untested. Steinhardt's ideas about the origin of the Universe are based on an extension of string theory called M-theory. M-theory does not do away with the Big Bang. The evidence that everything emerged from a 'fireball' with a temperature of 10 billion degrees, expanding on a timescale of one second, is now very compelling and uncontroversial. Instead, M-theory looks at events before the Big Bang, proposing that the Universe has 11 dimensions, six of them rolled up into microscopic filaments that can, for all intents, be ignored.

The Earth formed as part of the birth of the Solar System: what eventually became the solar system initially existed as a large, rotating cloud of dust, rocks, and gas. It was composed of hydrogen and helium produced in the Big Bang, as well as heavier elements ejected by supernovas. Then, as one theory suggests, about 4.6 billion years ago a nearby star was destroyed in a supernova and the explosion sent a shock wave through the solar nebula, causing it to gain angular momentum. As the cloud began to accelerate its rotation, gravity and inertia flattened it into a protoplanetary disk oriented perpendicularly to its axis of rotation. Most of the mass concentrated in the middle and began to heat up, but small perturbations due to collisions and the angular momentum of other large debris created the means by which protoplanets began to form. The infall of material, increase in rotational speed and the crush of gravity created an enormous amount of kinetic heat at the center. Its inability to transfer that energy away through any other process at a rate capable of relieving the build-up resulted in the disk's center heating up. Ultimately, nuclear fusion of hydrogen into helium began, and eventually, after contraction, a T Tauri star ignited to create the Sun. Meanwhile, as gravity caused matter to condense around the previously perturbed objects outside of the new sun's gravity grasp, dust particles and the rest of the protoplanetary disk began separating into rings. Successively larger fragments collided with one another and became larger objects, ultimately destined to become protoplanets. These included one collection approximately 150 million kilometers from the center: Earth. The solar wind of the newly formed T Tauri star cleared out most of the material in the disk that had not already condensed into larger bodies.

As for the first life form on the earth that is also unknown but there are also several theories on that too.

The details of the origin of life are unknown, though the broad principles have been established. Two schools of thought regarding the origin of life have been proposed. The first suggests that organic components may have arrived on Earth from space (see “Panspermia”), while the other argues for terrestrial origins. The mechanisms by which life would initially arise are nevertheless held to be similar. If life arose on Earth, the timing of this event is highly speculative—perhaps it arose around 4 billion years ago. In the energetic chemistry of early Earth, a molecule (or even something else) gained the ability to make copies of itself–the replicator. The nature of this molecule is unknown, its function having long since been superseded by life’s current replicator, DNA. In making copies of itself, the replicator did not always perform accurately: some copies contained an “error.” If the change destroyed the copying ability of the molecule, there could be no more copies, and the line would “die out.” On the other hand, a few rare changes might make the molecule replicate faster or better: those “strains” would become more numerous and “successful.” As choice raw materials (“food”) became depleted, strains which could exploit different materials, or perhaps halt the progress of other strains and steal their resources, became more numerous.

Several different models have been proposed explaining how a replicator might have developed. Different replicators have been posited, including organic chemicals such as modern proteins, nucleic acids, phospholipids, crystals, or even quantum systems. There is currently no method of determining which of these models, if any, closely fits the origin of life on Earth. One of the older theories, and one which has been worked out in some detail, will serve as an example of how this might occur. The high energy from volcanoes, lightning, and ultraviolet radiation could help drive chemical reactions producing more complex molecules from simple compounds such as methane and ammonia. Among these were many of the relatively simple organic compounds that are the building blocks of life. As the amount of this “organic soup” increased, different molecules reacted with one another. Sometimes more complex molecules would result—perhaps clay provided a framework to collect and concentrate organic material. The presence of certain molecules could speed up a chemical reaction. All this continued for a very long time, with reactions occurring more or less at random, until by chance there arose a new molecule: the replicator. This had the bizarre property of promoting the chemical reactions which produced a copy of itself, and evolution began properly. Other theories posit a different replicator. In any case, DNA took over the function of the replicator at some point; all known life (with the exception of some viruses and prions) use DNA as their replicator, in an almost identical manner.

Answer 3

There is discussion on this subject in response to a previous resolved question.

Answer 4

These are three extremely large and different questions.

Current scientific theory is leaning toward the Big Bang being the midpoint of the existence of the Universe.  Immediately preceding that was the Big Crunch preceded by a Universe undergoing Universal Contraction.

So the real beginning was lots of space with all matter evenly distributed throughout it all, held in equilibrium by gravity, and time did not exist.

See how easy it all is?

Answer 5

The creation of Earth came a long time after the Big Bang.  The first lifeforms came after the Earth was created and cooled.

The Big Bang theory simply explains what happens to a universe that begins very hot and dense, and then begins to expand (and cool)

It does not try to (and it cannot) explain what happens before, or why the universe was in that state.  It simply takes it for granted.

As the energy density (temperature) of the universe went down with expansion, some things "condensed":  first the forces themselves and the particles that carry the forces (bosons, gluons, photons).  That took about a second.

Then the "matter":  first the quarks, immediately captured by the gluons and forced to produce hadrons (protons, neutrons), then electrons, neutrinos...

The temperature and pressure were so high that protons would ram each other and fuse to produce heavier elements like helium, beryllium, lithium... but not much else, because the whole formation of matter stopped after 3 minutes (the temperature was too low for the fusion to continue).

For other elements like carbon, nitrogen oxygen, etc.  we have to wait until the large quantities of hydrogen collapse under their own gravity to form the first stars.

It is in the stars that the heavier elements were produced, then rejected into space by stellar winds and by the occasional supernova explosion.

It is only after a couple of generations of stars had produced enough heavier elements that planets like our Earth could be produced.

A large cloud of gas and "dust" collapsed under it own gravity.  The cloud was rotating a bit.  As it collapsed, the rotation increased.  Most of the stuff still dropped to the centre and formed the sun.  Because of the rotation, some of the stuff did not fall as fast to the centre and, eventually, formed the planets.

When the sun "turned on" (began the fusion reactions that made it a star), the pressure of light pushed the rest of the small stuff outward where it formed the Oort cloud (the collection of comets).

At first, many objects were on all kinds of orbits and collisions were frequent.  It is thought that much of the water on Earth came from comets crashing on Earth very early in its history.

In that water, molecules eventually arranged themselves in units that could divide and make copies of themselves.  Whatever that molecule was (probably similar to an ADN molecule), that was the first lifeform.