Krauss claims that our
universe arose naturally
and inevitably from the operation of gravity on the quantum vacuum, empty space teeming with virtual particles that spontaneously pop into existence before disappearing again.
How did the universe exist?
In the early years, everything was made of gas. This gas, mostly hydrogen and helium, expanded and cooled.
Over billions of years
, gravity caused gas and dust to form galaxies, stars , planets, and more. The matter that spread out from the Big Bang developed into everything in the universe, including you.
How did the universe come from nothing?
The Universe as we observe it today began with
the hot Big Bang
: an early hot, dense, uniform, … … Perhaps, according to cosmic inflation
Does the universe end?
The end result is unknown
; a simple estimation would have all the matter and space-time in the universe collapse into a dimensionless singularity back into how the universe started with the Big Bang, but at these scales unknown quantum effects need to be considered (see Quantum gravity).
Who created the universe?
Many religious persons, including many scientists, hold that
God
created the universe and the various processes driving physical and biological evolution and that these processes then resulted in the creation of galaxies, our solar system, and life on Earth.
How long will the universe last?
22 billion years
in the future is the earliest possible end of the Universe in the Big Rip scenario, assuming a model of dark energy with w = −1.5. False vacuum decay may occur in 20 to 30 billion years if Higgs boson field is metastable.
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 …
What is inside a black hole?
HOST PADI BOYD: While they may seem like a hole in the sky because they don’t produce light, a black hole is not empty, It’s actually a lot of matter condensed into a single point. This point is known as
a singularity
.
Who is the first God?
| Brahma | God of Creation, knowledge and Vedas; Creator of the Universe | Member of Trimurti | A roundel with a depiction of Brahma, 19th century | Other names Svayambhu, Virinchi, Prajapati |
|---|
How many universes are there?
There are still some scientists who would say, hogwash. The only meaningful answer to the question of how many universes there are is
one, only one universe
.
What will happen in 100 trillion years?
And so, in about 100 trillion years from now, every star in the Universe, large and small, will be
a black dwarf
. An inert chunk of matter with the mass of a star, but at the background temperature of the Universe. So now we have a Universe with no stars, only cold black dwarfs. … The Universe will be completely dark.
Will a black hole come to earth?
Scientists have discovered one of the smallest black holes on record – and the closest one
to Earth
found to date. … Very few black holes of this mass have been found in the universe. This black hole is 1,500 light years away from Earth, still inside the Milky Way galaxy.
How old is our galaxy?
Astronomers believe that our own Milky Way galaxy is
approximately 13.6 billion years old
. The newest galaxy we know of formed only about 500 million years ago.
Can we reach the edge of the universe?
Unfortunately, since universe is technically expanding faster than the speed of light (due to the expansion of space between matter),
it is theoretically impossible to ever reach the “edge” of the universe
, since it will always be moving away faster than we could ever move towards it!
How long is one hour in space?
The time dilation on that planet—one hour equals
7 Earth years
—seems extreme. To get that, you’d apparently need to be at the event horizon of a black hole.
Are there astronauts lost in space?
A total of 18 people have lost their lives either while
in space or in preparation for a space mission, in four separate incidents. Given the risks involved in space flight, this number is surprisingly low. … The remaining four fatalities during spaceflight were all cosmonauts from the Soviet Union.
