Most physicists, he begins, agree on the big-bang theory, which says that 14 billion years ago the entire observable universe
What was the size of universe before Big Bang?
But if we’re talking about the observable Universe, and we know we’re only able to access somewhere between the last 10
– 30
and 10
– 35
seconds of inflation before the Big Bang happens, then we know the observable Universe is
between 17 centimeters (for the 10
– 35
second version) and 168 meters (for the 10
– 30
second
…
How big was the object that caused the Big Bang?
The Big Bang theory can be summarized thusly: At one time, the entire universe — everything you know and love, everything on the Earth and in the heavens — was crushed into
a trillion-Kelvin ball about the size of a peach
. Or apple. Or small grapefruit.
Did the Big Bang make the universe bigger?
While an explosion of a man-made bomb expands through air, the Big Bang did not expand through anything. That’s because there was no space to expand through at the beginning of time. Rather,
physicists believe the Big Bang created and stretched space itself, expanding the universe
.
How small can the universe be compressed?
The smallest conceivable answer —
17 centimeters
— is about the size of a soccer ball! The Universe couldn’t have been much smaller than that, since the constraints we have from the Cosmic Microwave Background (the smallness of the fluctuations) rule that out.
What is smallest thing in universe?
Quarks
are among the smallest particles in the universe, and they carry only fractional electric charges. Scientists have a good idea of how quarks make up hadrons, but the properties of individual quarks have been difficult to tease out because they can’t be observed outside of their respective hadrons.
Will the Universe end?
Astronomers once thought the universe could collapse in a Big Crunch. Now most agree
it will end with a Big Freeze
. … Trillions of years in the future, long after Earth is destroyed, the universe will drift apart until galaxy and star formation ceases. Slowly, stars will fizzle out, turning night skies black.
How big is the universe without empty space?
So all of the matter in the universe would fit into
about 1 billion cubic light years
, or a cube that’s approximately 1,000 light years on each side. That means that only about 0.0000000000000000000042 percent of the universe contains any matter. The universe is a pretty empty place!
What percentage of the universe is empty space?
But it might humble you to know that all of those things — your friends, your office, your really big car, you yourself, and everything in this incredible, vast universe — are almost entirely,
99.9999999%
, empty space.
How much can matter be compressed?
Although general relativity says that
there is no upper limit on how much you can compress matter
, theories of quantum gravity might say that it cannot be compressed beyond the Planck density, which is around one Planck mass per Planck volume (Planck length cubed).
Is infinitely small possible?
According to the Standard Model of particle physics, the particles that make up an atom—quarks and electrons—are point particles: they do not take up space. … Physical space is often regarded as
infinitely divisible
: it is thought that any region in space, no matter how small, could be further split.
What is the biggest thing in universe?
The largest known ‘object’ in the Universe is
the Hercules-Corona Borealis Great Wall
. This is a ‘galactic filament’, a vast cluster of galaxies bound together by gravity, and it’s estimated to be about 10 billion light-years across!
What is the smallest thing in the human body?
A cell
is the smallest independently functioning unit of a living organism.
What happens when you reach the end of space?
It will expand forever;
the galaxies within groups and clusters will merge together to form a giant super-galaxy
; the individual super-galaxies will accelerate away from one another; the stars will all die or get sucked into supermassive black holes; and then the stellar corpses will get ejected while the black holes …
Is time Travelling possible?
Time travel to the past is
theoretically possible
in certain general relativity spacetime geometries that permit traveling faster than the speed of light, such as cosmic strings, traversable wormholes, and Alcubierre drives.
Is our universe in a black hole?
The birth of our universe may have come from
a black hole
. Most experts agree that the universe started as an infinitely hot and dense point called a singularity.
